﻿ Todd begins piano practice at 4:15 pm and ends at 5:50 pm. How long does he practice. - AssignmentGrade.com

# Todd begins piano practice at 4:15 pm and ends at 5:50 pm. How long does he practice.

QUESTION POSTED AT 26/03/2020 - 01:05 PM

Todd practiced for 1:45 minutes because of you subtracted 5:50 minus 4:15 it would equal 1:45 hope that helped

## Related questions

### At a carnival game, you randomly throw two darts at the board and break two balloons out of 15. What is the probability that both the balloons you break are purple? Write your answer as a fraction or percent rounded to the nearest tenth. (3 red, 4 blue, 2 green, 2 yellow, 4 purple)

Add up the total number of balloons (15) there are 4 purples so the probably of you getting purple at all is 4/15. consider that after you hit the first purple, your odds decrease to 3/14.

ANSWERED AT 28/03/2020 - 01:00 PM

QUESTION POSTED AT 28/03/2020 - 01:00 PM

### Joe has two empty boxes, one box is 15 inches wide, 20 inches long and 10 inches high. The second box has the same length and width but is 4 inches taller. How much additional spaces is in the box

Space in the box = volume
volume = length x width x height
box 1 volume = 15 x 20 x 10 = 3000
box 2 volume = 15 x 20 x 14 = 4200
how much space is left = box 2 - box 1 = 1200 inches

ANSWERED AT 28/03/2020 - 12:44 PM

QUESTION POSTED AT 28/03/2020 - 12:44 PM

### Which of the equations has a solution of 7. y - 41 = 48 m + 6= 1 z - 2 = 5 n + 50 = 30

The answer to th question is 7.

ANSWERED AT 28/03/2020 - 12:42 PM

QUESTION POSTED AT 28/03/2020 - 12:42 PM

### Which of the equations has a solution of 7. y - 41 = 48 m + 6= 1 z - 2 = 5 n + 50 = 30

The third one because you plug 7 in for z
Z-2=5 turns into 7-2=5 which is true

ANSWERED AT 28/03/2020 - 12:42 PM

QUESTION POSTED AT 28/03/2020 - 12:42 PM

### Krypton-91 is a radioactive substance that decays very quickly. The function Q(t)=Qoe^-kt models radioactive decay of krypton-91. Q represents the quantity remaining after t seconds and the decay constant k is approximately 0.07. How long will it take a quantity of krypton-91 to decay t o10% of its origional amount? round your answer to the nearest second.

32.894 seconds ≈ 33 seconds

Step-by-step explanation:

Function : The function models radioactive decay of krypton-91.

The decay constant k is approximately 0.07. denotes initial amount .

We are require to find How long will it take a quantity of krypton-91 to decay to 10% of its original amount  So, we neet to find t at which   Taking log both sides     Thus it will take 32.894 seconds ≈ 33 seconds a quantity of krypton-91 to decay to 10% of its original amount.

ANSWERED AT 28/03/2020 - 12:28 PM

QUESTION POSTED AT 28/03/2020 - 12:28 PM

### Paige borrows $700 from her parents for a new computer. She repays$100 the first month, then begins to repay her parents $75 per month. Which recursive formula models the total amount of money still owed, mc022-1.jpg? Answer: Option B is correct ; Step-by-step explanation: The recursive formula for the arithmetic sequence is given by: ..... where, d is the common difference. n is the number of terms. As per the statement: Paige borrows$700 from her parents for a new computer.

She repays $100 the first month, then begins to repay her parents$75 per month.

Now, she only has to pay back after then,  $700 -$100 = $600 then, begins to repay her parents$75 per month.

The sequence we get;

600, 525, 450, ....

This is the arithmetic sequence.

here, and d = -75

Since,

525-600 = -75

450-525 = -75 and so on...

Substitute the given values in  we have; Therefore, the recursive formula models the total amount of money still owed is: ; ANSWERED AT 28/03/2020 - 12:25 PM

QUESTION POSTED AT 28/03/2020 - 12:25 PM

### Kelsey correctly used the Fermi process and the following estimates to determine how many books would fill a railroad car. A book is about 1 ft long, 12 ft wide, and 15 ft thick. A railroad car is about 60 ft long, 10 ft wide, and 10 ft high. Which equation could she have written? 6×1031×10−1=6×104 6×1031×10−1=6×102 6×1041×10−1=6×105 6×1041×10−1=6×103

6 x 10^4

Step-by-step explanation:

took the quiz

ANSWERED AT 28/03/2020 - 12:17 PM

QUESTION POSTED AT 28/03/2020 - 12:17 PM

### Joel is laying pipe for a sprinkler system before he plants his lawn. The lawn is a rectangle, 15 feet long and 8 feet wide. He needs to lay a piece of pipe that will run along the diagonal of the lawn. It will divide the area of the lawn into two right triangles. What will be the length of the pipe? A. 120 feet B. 17 feet C. 23 feet D. 289 feet

Answer: B is the right answer. Diameter of the given rectangular lawn=17 feet.

Step-by-step explanation:

Given: A rectangular lawn 15 feet long and 8 feet wide.

To find the diagonal of lawn such that it will divide the area of the lawn into two right triangles. [i.e. diagonal will be the hypotenuse]

So by Pythagoras theorem of right triangles, Therefore diameter of the given rectangular lawn=17 feet.

ANSWERED AT 28/03/2020 - 12:10 PM

QUESTION POSTED AT 28/03/2020 - 12:10 PM

### Ralph is an electrician. He charges an initial fee of $24, plus$33 per hour. If Ralph earned $189 on a job, how long did the job take? Charge of Ralph: Charge =$24  + $33 per hour Let the time worked be = x. For x hours, the cost = 33*x = 33x Charge = 24 + 33x 24 + 33x = 189 33x = 189 - 24 33x = 165 x = 165/33 x = 5 The job took 5 hours. I hope this helped ANSWERED AT 28/03/2020 - 12:09 PM QUESTION POSTED AT 28/03/2020 - 12:09 PM ### Carl puts$1.10 in his penny bank every day in the month of July (31 days). His total savings was $55.00 at the end of June.What's the best estimate for Carl's savings at the end of July?$89
because 1.10 multiplied by 31 is 34.10
you round that to 34 and add it to 55 which gives you 89

ANSWERED AT 28/03/2020 - 12:04 PM

QUESTION POSTED AT 28/03/2020 - 12:04 PM

M=3.50h
it will take juan about 4.5 hours to earn $15 ANSWERED AT 28/03/2020 - 11:57 AM QUESTION POSTED AT 28/03/2020 - 11:57 AM ### A small start-up company with 15 employees will select its 4 board members from among the employees. How many different groups of board members are possible? Because the order of people does not matter, we can use a permutation to find the answer. For the first choice there are 15 possible people. For the second one there are 14 possibilities (since one person has already been chosen) and so on. To get the total number of combinations we do: ANSWERED AT 28/03/2020 - 11:50 AM QUESTION POSTED AT 28/03/2020 - 11:50 AM ### Tim’s quizzes count for 50% of his grade, his notes counts for 20% of his grade, and tests count for 30% of his grade. If he has quiz scores of 5, 2, and 9, notes scores of 3, 9, and 5, and test scores of 9, 5, and 9, his overall score is _____. Do not round your answer. To find Tim's overall score, first we must find the sum of his scores from quizzes, notes, and tests. Hence, we have quizzes = (5 + 2 + 9) = 16/3 notes = (3 + 9 + 5)/3 = 17/3 tests = (9 + 5 + 9)/3 = 23/3 Now, we must consider the percentage that these tests contribute to his overall score. So we have the following: quizzes = 0.5(16)/3 = 8/3 notes = 0.2(17)/3 = 3.4/3 tests = 0.3(23)/3 = 6.9/3 We now add these to find the overall score which is 8 /3+ 3.4/3 + 6.9/3 = 18.3/3 = 6.1. Thus, Tim's overall score is 6.1. Answer: 6.1 ANSWERED AT 28/03/2020 - 11:40 AM QUESTION POSTED AT 28/03/2020 - 11:40 AM ### Sergio has decided to diversify his investments in the following way:$4,000 in an account earning 3.2% simple interest $4,000 in a savings account earning 2.1% interest compounded annually$7,500 in a certificate of deposit earning 5% interest compounded quarterly How much total interest will Sergio earn on his investments at the end of 4 years?

Future value of all investments
4,000×(1+0.032×4)+4,000
×(1+0.021)^(4)+7,500×(1
+0.05÷4)^(4×4)
=18,007.90

Total interest earned
18,007.90−(4,000
+4,000+7,500)

ANSWERED AT 28/03/2020 - 11:32 AM

QUESTION POSTED AT 28/03/2020 - 11:32 AM

### Marco invested $3000 into a fund that is expected to grow by 4.23% per year. How long will it take the fund to be worth$6000? A. about 4.2 years B. about 9.5 years C. about 10.5 years D. about 17 years

At 4.2 years 120555 at 90.5. So your Most Logical Answer is B

ANSWERED AT 28/03/2020 - 11:31 AM

QUESTION POSTED AT 28/03/2020 - 11:31 AM

### Mrs. Ming invested an amount of money in two accounts for one year. She invested some at 8% interest and the rest at 6% interest. Her total amount invested was $1,500. At the end of the year, she had earned$106.40 in interest. How much had Mrs. Ming invested in the account paying 6%?

Amount Mrs. Ming invested in account paying 6% is 1500 - 820 = $680. Step-by-step explanation: Let Mrs. Ming invest amount in a account So the amount in 2nd account Rates are, % % We use formula of Simple interest, According to the question,      Therefore, Amount Mrs. Ming invested in account paying 6% is 1500 - 820 =$ 680.

ANSWERED AT 28/03/2020 - 11:28 AM

QUESTION POSTED AT 28/03/2020 - 11:28 AM

### Sarah picks a bushel of apples in 45 min. Andy picks a bushel of apples 75. How long will it take them to pick a bushel together? A) about 14 min B) about 28 min C)about 40 in D)about 60 min

The rest of the answers are

1. D
2. D
3. C
4. B
5. C
6. B
7. B
8. B
9. A
10. C

ANSWERED AT 28/03/2020 - 11:24 AM

QUESTION POSTED AT 28/03/2020 - 11:24 AM

### You have a credit card with a balance of $754.43 at a 13.6% APR. You have$300.00 available each month to save or pay down your debts. How many months will it take to pay off the credit card if you put all of the available money toward the credit card each month and make the payments at the beginning of the month?

B(n) = A(1 + i)^n - (P/i)[(1 + i)^n - 1]

where B is the balance after n payments are made, i is the monthly interest rate, P is the monthly payment and A is the initial amount of loan.

We require B(n) = 0...i.e. balance of 0 after n months.

so, 0 = A(1 + i)^n - (P/i)[(1 + i)^n - 1]

Then, with some algebraic juggling we get:

n = -[log(1 - (Ai/P)]/log(1 + i)

Now, payment is at the beginning of the month, so A = $754.43 -$150 => $604.43 Also, i = (13.6/100)/12 => 0.136/12 per month i.e. n = -[log(1 - (604.43)(0.136/12)/150)]/log(1 + 0.136/12) so, n = 4.15 months...i.e. 4 payments + remainder b) Now we have A =$754.43 - $300 =$454.43 so,

n = -[log(1 - (454.43)(0.136/12)/300)]/log(1 + 0.136/12)

so, n = 1.54 months...i.e. 1 payment + remainder

ANSWERED AT 28/03/2020 - 11:20 AM

QUESTION POSTED AT 28/03/2020 - 11:20 AM

### You owe $1,945.61 on a credit card that has an 11.2% APR. The minimum payment due is$156.00. You decide to pay $300.00. How much do you save in interest by paying more than the minimum, assuming you make both payments at the beginning of the month? The answer would be:$1.35

ANSWERED AT 28/03/2020 - 11:14 AM

QUESTION POSTED AT 28/03/2020 - 11:14 AM

### Google has just purchased your website that reviews GPS systems. You made a profit of $65,000. You would like to invest the$65,000 into an account that pays you an annual compounded interest rate of 5.5%. You want to make annual withdrawals over the next 10 years such that by the end of this 10 year period, the amount remaining in the account will be zero dollars. Determine, from the given information, the amount of the annual withdrawals. Round your answer to the nearest cent. a. 6,500 b. 7,023.45 c. 7,251.31 d. 8,623.40

See the formula of the present value of annuity ordinary through Google
Solve for PMT
PMT=65,000÷(((1−(1+0.055)^(−10))÷(0.055)))=8,623.40

ANSWERED AT 28/03/2020 - 11:14 AM

QUESTION POSTED AT 28/03/2020 - 11:14 AM

### Oscar Montez’s savings account has a principal of $7,201. It earns 6% interest compounded quarterly. What is the amount of interest he earned by the end of the second quarter? A.$108.01 B. $15.03 C.$231.06 D. $217.66 Answer: D.$217.66

Step-by-step explanation:

The equation for compound interest is , where p is the amount of principal invested, r is the interest rate, n is the number of times per year the interest is compounded and t is the number of years.

Our principal is 7201, our interest is 6% (0.06) and our value for n is 4, since it is compounded quarterly.  Our value for t will be 0.5, since 2 quarters make one half of a year: This is the total amount in the account.  To find the amount of interest, subtract the principal:

7418.65-7201 = 217.65

This is closest to 217.66.

ANSWERED AT 28/03/2020 - 11:12 AM

QUESTION POSTED AT 28/03/2020 - 11:12 AM

### Tara deposits $1,000 in a retirement savings account at the beginning of each year. The account pays an interest rate of 5% compounded annually, and the interest is paid on the last day of the year. What is the balance in Tara’s account at the end of the fourth year? A.$4,310.13 B. $4,525.63 C.$5,525.63 D. \$5,801.91

See the formula of the future value of annuity due through Google
÷0.05))×(1+0.05))=4,525.63

ANSWERED AT 28/03/2020 - 11:04 AM

QUESTION POSTED AT 28/03/2020 - 11:04 AM

### I NEED HELP! A bungee jumper falls 97.2 feet before bouncing back up at the end of his bungee cord. Then he falls 64.8 feet before bouncing up again. On his third descent, he falls 43.2 feet before going back up. What is the total distance the bungee jumper drops after five falls if the distances continue in this pattern? (Do not include the distance traveled up.) A. 234.0 ft B. 253.2 ft C. 789.8 ft D. 1,281.8 ft

Well, first you have to try to find the missing numbers. ONce you do that, you have to add it all up and the final avrage will be B.

ANSWERED AT 28/03/2020 - 11:03 AM

QUESTION POSTED AT 28/03/2020 - 11:03 AM

### A building that is 100 ft tall casts a shadow that makes a 30 degree angle with the ground. Approximately how long, in feet, is the shadow across the ground?

100 is how long the shadow would be.

To solve, remember the ratio for a 30/60/90 triangle:
short side = x
long side = x hypotenuse = 2x

the short side is the building, which is 100, so the long side is 100 ANSWERED AT 28/03/2020 - 11:00 AM

QUESTION POSTED AT 28/03/2020 - 11:00 AM

### Amir pitches a baseball at an initial height of 6 feet, with a velocity of 73 feet per second. If the batter misses, about how long does it take the ball hit the ground? Hint: Use H(t) = -16t^2+vt+s

4.643 seconds

Step-by-step explanation:

We have been given that

s = 6 feet

v = 73 feet per second

Substituting these values in the formula  When the ball hits the ground, the height becomes zero. Thus, H(t)=0 We solve the equation using quadratic formula Substituting the values  time can't be negative. Hence, t = 4.643.

Hence, the ball will take  4.643 seconds to hit the ground.

ANSWERED AT 28/03/2020 - 10:59 AM

QUESTION POSTED AT 28/03/2020 - 10:59 AM

### A poll was taken outside three voting precincts. Voters were asked who they voted for in an election. Cramer Denton Garcia Lewis Total Precinct 1 13 7 21 9 50 Precinct 2 25 6 10 9 50 Precinct 3 10 5 24 11 50 Select from the drop-down menu to complete the statement using the information from the table.

The correct answer is 1760 :)

ANSWERED AT 28/03/2020 - 10:55 AM

QUESTION POSTED AT 28/03/2020 - 10:55 AM

### Julie wants to have a 90 average in her math class at the end of the year. She is trying to determine what she needs to make on her final exam for this to work. Everything is weighted equally and she currently has a 85 for her quiz average, a 80 for her homework average, a 92 for her test average, and a 98 for her project average. What does she need to make on her final exam for her to end up with a 90 in the class?

She needs a 95 because the average without 95 is 88.75 then 85 + 80 + 92 + 98 + 95 = 450 then 450÷5=90 so 95 is the answer

ANSWERED AT 28/03/2020 - 10:51 AM

QUESTION POSTED AT 28/03/2020 - 10:51 AM

### Todd’s friend Olivia is flying her plane at an elevation of 6.3 km. From the ground, Todd sees the plane moving directly toward him from the west at a 49° angle of elevation. Three minutes later he turns and sees the plane moving away from him to the east at a 65° angle of elevation. How fast is Olivia flying in kilometers per hour?

Use trig rules twice, get each distance, add for total distance, compute velocity.

ANSWERED AT 28/03/2020 - 10:44 AM

QUESTION POSTED AT 28/03/2020 - 10:44 AM

### Penny needs 30 cubic ft of sand to fill a sandbox. She plans to buy 10 bags of sand for her sandbox. Each bag contains 2.9 cubic feet of sand. Is this a reasonable plan? A. Yes, it is reasonable because each bag covers around 3 cubic feet. So in order to cover 30 cubic feet she would need 10 bags to be sure she has enough and end up with a little extra. B. No, it is not reasonable because each bag covers around 3 cubic feet. So in order to cover 30 cubic feet, she would need at least 30 bags to be sure she has enough sand. C. No, it is not reasonable because each bag covers a bit less than 3 cubic feet. So in order to cover 30 cubic feet, she would need to buy 11 bags to be sure she has enough sand

Because: 2.9 multiplied by 10 bags equals 29cubic ft and she needs 30 cubic ft. So she would need to buy 11 bags to make sure she has enough sand for the whole thing. 11 x 2.9 = 31.9 which ensures she has enough for the whole thing including extra in case. So you answer would be Answer C.

ANSWERED AT 28/03/2020 - 10:39 AM

QUESTION POSTED AT 28/03/2020 - 10:39 AM

### A ladder that is 10 feet long is leaning against a wall. the base of the ladder is 6 feet from the wall. assuming the wall meets the ground at a right angle, at what height will the top of the ladder touch the wall?

The ladder will touch the wall at 8 ft

ANSWERED AT 28/03/2020 - 10:39 AM

QUESTION POSTED AT 28/03/2020 - 10:39 AM