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Questions asked by admin

You develop active immunity to a pathogen by

Active immunity can be natural or artificially developed. Naturally acquired - a person is exposed to a live pathogen, develops an immune response - and then creates memory T and B cells. Artificially acquired - a person is given a vaccine (which contains the antigen). This stimulates the same response, without the symptoms of the disease.





ANSWERED AT (01/04/2020 - 01:49 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:49 PM

Jerry earned $16 doing his chores last week. On Monday, he bought a football that cost $11. Which number is the additive inverse of the amount of money Jerry has left?

Answer:

The answer is B

Step-by-step explanation:

ANSWERED AT (01/04/2020 - 01:48 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:48 PM

If Katie bought some flowers she use 3/8 of it to bake bread what percent of the flour is left

Eight minus three is five so 5/8.

ANSWERED AT (01/04/2020 - 01:48 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:48 PM

At another theater workers have to cut a new trap door.the door can be no mre than 130 sq ft in the area with whole number side lengths.they have to bring in 3 items to the stage.the first item is 6 feet,5 inches wide and 8 feet,9 inches long.the seconed item is 13 feet,4 inches wide and 7 feet, 8 inches long.the third item is 5 feet,6 inches wide and12 feet, 4 inches long. what size of trap door would you reccomend? what is the perimeter of the trap door

HhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhGiven:
trap door = 130 square feet.

1st item: 6ft 5in wide & 8ft 9in long 
⇒ (6ft * 12 in) + 5 in & (8ft *12 in) + 9 in
⇒ 77inches by 105 inches
⇒ 8,085 square inches

2nd item: 13ft 4in wide & 7ft 8in long
⇒ (13ft * 12in)+ 4 in & (7ft *12in) + 8 in
⇒ 160 inches by 92 inches
⇒ 14,720 square inches

3rd item: 5ft 6in wide & 12ft 4in long
⇒ (5 ft * 12in) + 6 in & (12ft * 12in) + 4in
⇒ 66 inches by 148 inches
⇒ 9,768 square inches

130 square feet convert to square inches.
130 sq. ft * 144 sq.in/sq.ft = 18,720 sq. in

18,720 sq. in / 160 inches = 117 inches

Length = 160 inches ; Width = 117 inches
Perimeter = 2(160 + 117)
P = 2(277)
P = 554 inches
P = 2(277)
P = 554 inches 

ANSWERED AT (01/04/2020 - 01:48 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:48 PM

In one town, 39% of all voters are Democrats. If two voters are randomly selected for a survey, find the probability that they are both Democrats. Round to the nearest thousandth if necessary.

Answer:

The probability is 0.152

Step-by-step explanation:

We know that in this town 39% of all voters are Democrats. Therefore, the probability of a randomly selected voter being a Democrat is p=0.39

The experiment of randomly select voters for a survey is called a Bernoulli experiment (under some suppositions). We suppose that exist independence in this randomly selection of voters. We also suppose that there are only two possibilities for the voter : It is Democrat or not.

Now the variable X : ''The randomly selected voter for a survey is Democrat'' is a Binomial random variable.

X ~ Bi (n,p)

The probability function for the BInomial random variable X is :

P(X=x)=(nCx).p^{x}.(1-p)^{n-x}

Where ''n'' is the number of Bernoulli experiments (In this case n = 2 because we randomly selected two voters)

P(X=x) is the probability of the variable X to assumes the value x

(nCx) is the combinatorial number define as

(nCx)=\frac{n!}{x!(n-x)!}

p = 0.39 in this exercise.

We are looking for P(X=2) ⇒

P(X=2)=(2C2).(0.39)^{2}.(1-0.39)^{2-2}=(0.39)^{2}=0.1521

If we round to the nearest thousandth the probability is 0.152

ANSWERED AT (01/04/2020 - 01:48 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:48 PM

PLZ help! Combine like terms (simply) 7 -3(4-2x) -10x students Answer: 16 - 18x What was the students mistake? What us the right way to do this?

Correct answer: 7-12+6x which simplifies to -5+6x

ANSWERED AT (01/04/2020 - 01:48 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:48 PM

What attempts did the North and the South make to compromise? What were the results?

Lincoln tired to end slavery. The north wasn't having it but the south wanted to keep it

ANSWERED AT (01/04/2020 - 01:48 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:48 PM

Calculate the mole fraction of the total ions in an aqueous solution prepared by dissolving 0.400 moles of MgBr2 in 850.0 g of water

Answer : The mole fraction of the total ions in an aqueous solution is 0.0248

Explanation :

First we have to calculate the moles of water.

\text{Moles of water}=\frac{\text{Mass of water}}{\text{Molar mass of water}}=\frac{850.0g}{18g/mole}=47.22moles

Now we have to calculate the moles of magnesium ion and bromide ion.

As we are given that 0.4 moles of MgBr_2 that means, there are 0.4 moles of magnesium ion and 0.8 moles of bromide ions.

Total mole of ions in an aqueous solution = 0.4 + 0.8 = 1.2 mole

Now we have to calculate the mole fraction of the total ions in an aqueous solution.

\chi_{\text{(Total ions)}}=\frac{n_{\text{(Total ions)}}}{n_{\text{(Total ions)}}+n_{water}}

\text{Mole fraction of total ions in an aqueous solution}=\frac{1.2mole}{1.2mole+47.22mole}=0.0248

Therefore, the mole fraction of the total ions in an aqueous solution is 0.0248

ANSWERED AT (01/04/2020 - 01:47 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:47 PM

England and Spain went to war in the 1560s because Spain demanded a. that the Dutch remain Catholics. b. that the Dutch convert to Protestantism. c. that England pay high taxes on trade. d. control over the English Channel.

Answer: D is correct.

Explanation: At the time the Netherlands was a Spanish territory (Charles V inherited this territory from his ancestors, dukes of Burgundy) which brought quite a lot of money to Spain because Netherlands was the most  prosperous part of Spanish empire. The problem was the protestantism of Dutch, their unwillingness to get converted to Catholicism and obey Spanish Catholic mores and rules. The result of that ? Many rebellions of Dutch, disrespect toward Spanish power. Many Dutch found aid and support in England (in this respect English Chanel was crucial) and over the time there was sort of unwritten alliance between the Dutch and the English. And that was something Spaish crown wanted to stop. At the time Spain (house of Habsburg) was considered the most powerful of European countries.

ANSWERED AT (01/04/2020 - 01:47 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:47 PM

Identify two ways an adaptation helps a species? I need help on this problem soon please! Thanks!

1. food meaning their source food could no longer be there so they have to search for something else to eat in order for survival 
2. weather meaning the weather of which that animal is used to has chnaged for ex.) in Antarctica the weather is getting warmer so the polar bears and pennguins can adapt or die 

ANSWERED AT (01/04/2020 - 01:47 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:47 PM

45÷3=15 is the same as___ ÷3 plus_____÷3=______

36 divided by 3 plus 90 divided by 3 I think I hope this helps u

ANSWERED AT (01/04/2020 - 01:47 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:47 PM

What is a shy, introvert, quiet, caring and smart animal?

I would say a sheep or kitten. Sheep are both smart and shy and a kitten is the same too. Hope this helps! Pls mark me as brainliest! :)

ANSWERED AT (01/04/2020 - 01:47 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:47 PM

What is the square root of 4 5

Square root of 45 is 6.7082039325

ANSWERED AT (01/04/2020 - 01:47 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:47 PM

How can volume be measured

The volume of a cube or box can be measured by multiplying its length, width, and height (length x width x height).

The units of measure for volume are cubic units, such as cubic centimeters.

ANSWERED AT (01/04/2020 - 01:47 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:47 PM

Find the volume of the cylinder. Round your answer to the nearest tenth

V = pi*(r^2)*h
V = pi*(7^2)*5
V = pi*(49)*5
V = 245pi ft^2
V = 796.7 ft^2

ANSWERED AT (01/04/2020 - 01:47 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:47 PM

An electric pump can fill a 45-gallon tub in half an hour.At this rate, how long would it take to fill a 60-gallon tub?

You can cross multiply to find the answer. Start by setting up your equation:

45/30 = 60/x  (30 represents half an hour)
Next, cross multiply, 45 times x, and 60 times 30: 

45x = 1800  you must isolate the "x" value by using the opposite operation it is involved in. Here we have 45x (x is multiplied to 45) so we must divide 45, which will cancel itself out, leaving us with "x."

What you do on one side of the equation, you must do on the other, so divide 1800 by 45 as well, which will leave you with 40.

Working it out on paper, your equation should now look like this: x=40, which represents the amount of time it will take to fill a 60 gallon tube.

Answer: It will take 40 minutes to fill a 60 gallon tube. 

ANSWERED AT (01/04/2020 - 01:47 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:47 PM

What is binomial nomenclature for human beings

The binomial nomenclature for a human is Homo Sapiens. Binomial means two names, and nomenclature means to chose a name. Therefore the two word classification of a human being is homo sapiens. (It also means wise man)

ANSWERED AT (01/04/2020 - 01:47 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:47 PM

If the sale tax in New York is 8.25%, about how much will a 65.95 pair of shoe cost, including sale tax

79.14 dolaaaaaaaaaaaaaaaaaaaaaaaaarrrrrs

ANSWERED AT (01/04/2020 - 01:46 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:46 PM

What is the equation of the circle with a Center of (0,9) and a Radius of 7

Equation of Circle:

Center(h,k) radius(r)

(x-h)^2 + (y-k)^2 = r^2


#14
C(0,0) r = 2

(x-0)^2 + (y-0)^2 = 2^2
x^2 + y^2 = 4


#15
C(2,0) r = 3

(x-2)^2 + (y-0)^2 = 3^2
(x-)^2 + y^2 = 9


...

ANSWERED AT (01/04/2020 - 01:46 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:46 PM

Shermans computer store has a computer on sale for 812.00. the sales tax is 7.5percent what is the total cost of the computer

computer on sale for 819.5

ANSWERED AT (01/04/2020 - 01:46 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:46 PM

In the series circuit, is the current constant throughout the circuit, or does it vary?

If the voltage is constant (DC like a battery, not AC), there are only resistors in the circuit (not capacitors or inductors) and the resistance doesn't vary, then the current through any circuit is constant.

ANSWERED AT (01/04/2020 - 01:46 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:46 PM

Why Is markup necessary for retail sales

Markup is necessary for the company to gain money instead of losing money

ANSWERED AT (01/04/2020 - 01:46 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:46 PM

When foreign material enters the body, one way the immune system responds is by

Pathogens may enter you but there is a layer (almost like a wall) that they will have to get through first (in the skin) bacteria can also kill pathogens. The immune system will produce antibodies that will also kill off pathogens.

ANSWERED AT (01/04/2020 - 01:46 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:46 PM

The sale tax in New York is 8.25%, about how much will a 65.95 pair of shoes cost including sale tax

Sale tax in NEW YORK wilbe for the shoes
cost including the tax 74.2

ANSWERED AT (01/04/2020 - 01:46 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:46 PM

37 is decreased to 17 rounded to the nearest tenth

I think it is 20 because 17 rounded is 20

ANSWERED AT (01/04/2020 - 01:46 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:46 PM

All of these factors are forces that threaten the current democratic government of Afghanistan except _____. the presence of al-Qaida local powerbrokers Taliban sympathizers invasion by the Soviet Union

Answer:

Option: Invasion by the Soviet Union.

Explanation:

The Soviet Union invaded Afghanistan in 1979. Afghan government need for help from soviet to fight against the mujaheddin rebels was the reason for their invasion. The Soviet occupancy in Afghanistan ended in 1989. Eventually, the Soviet Union ended in on 26 December 1991 and replaced by Russian Federation.

ANSWERED AT (01/04/2020 - 01:46 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:46 PM

Find the volume of the cylinder. Round your answer to the nearest tenth

Answer. 42.41
Cylinder Equation: SA= 2× 3.14×r^2+2×3.14×r×h
Diameter of circle divided by 2 to get the radius =1.5
R= Radius
H=Height

ANSWERED AT (01/04/2020 - 01:46 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:46 PM

Im in dyer need of how to solve these problems

#4)
{ A}
Triangle ABC is congruent to triangle YXZ. How do I know this?
 Look at the angles and adjacent (bottom) line.
Because Angle A and Angle Y are both equal to (what I believe says) 78 degrees, they are equal. 
Next, Angle B is equal to Angle X because it is the angle that connects the adjacent (bottom) line and the hypotenuse (top line). Even though they have no measurements or tick marks, it's the process of elimination.
Finally, Angle C and Angle Z. We know that these are equal do to their degree similarity of (what I think is) 65.

{B} Triangle ABC is congruent to Triangle RSQ. How do I know this?
Because Angle A is congruent to the only other angle there, Angle R.
Next, B and S are congruent. If you think of them as angles, then you can see that "angle" b is connected to the leg of AB and BC. AC has one tick mark, as does RS. BC has no tick or anything to note it's congruence. So because Point be is stick in between a leg with one tick and one leg with no tick, look for the similarity in triangle RSQ. The similarity showing as S. You should understand enough now to know how I got how C and P are congruent. 

#5) Sadly I cannot read the diagram they provide, so I cannot help with it.

#6) The length of BC: ?  The length of XZ:   ?  Measure of Angle BZX: 55 degrees. 

ANSWERED AT (01/04/2020 - 01:46 PM) BY ADMIN


QUESTION POSTED AT 01/04/2020 - 01:46 PM