An article describes a study in which a new type of ointment was applied to forearms of volunteers to study the rates of absorption into the skin. Eight locations on the forearm were designated for ointment application. The new ointment was applied to four locations, and a control was applied to the other four. How many different choices were there for the four locations to apply the new ointment

Answers

Answer 1

Answer:

There were 70 choices for the four locations to apply the new ointment

Step-by-step explanation:

The order in which the locations are chosen is not important. So we use the combinations formula to solve this question.

Combinations formula:

[tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by the following formula.

[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]

How many different choices were there for the four locations to apply the new ointment

Four locations from a set of 8. So

[tex]C_{8,4} = \frac{8!}{4!(8-4)!} = 70[/tex]

There were 70 choices for the four locations to apply the new ointment


Related Questions

A water faucet leaks 3/5 of a liter of water in 3/4 of an hour. Which TWO statements are correct for this situation


1. The faucet leaks 4/5 liter per hour.

2. The faucet leaks 5/4 liter per hour.

3. The faucet leaks 2/5 liter per 1/2 hour.

4. The faucet leaks 3/8 liter per 1/2 hour

5. The faucet leaks 3/10 liter per 1/2 hour.

Answers

Answer:

A & C

Step-by-step explanation:

Please just trust me

Answer:The faucet leaks 4/5 liter per hour.

The faucet leaks 2/5 liter per 1/2 hour.

Step-by-step explanation:

hlep plees

hi i need to do a test for mi 1 grad clas
what 2-2=
3-1=
and for my hom work
what is
56-210=

300x 285
please help

Answers

2 - 2 = 0
3 - 1= 2
56 - 210= 154 (or -154)
300 x 285=85500

Answer:

0, 2, 154, 85,500

Step-by-step explanation:

these are the anwsers to your question

Write an equation in slope-intercept form that describes the relationship between the number of minutes, x, and the amount charged, y.​

Answers

Answer:

y = 1/20x + 6

Step-by-step explanation:

The number of minutes is your x-value. The amount charged is your y-value.

Let's convert the numbers in the table into coordinates.

(30, 7.5)

(120, 12)

(220, 17)

Now, we will take two points and use the slope formula to plug into the slope-intercept equation: y = mx + b

I chose the first and last points given. All three points do not lie on the same line, but using the first and last point should be closer to the line of best fit.

(30, 7.5) & (220, 17)

m = (y₂ - y₁) / (x₂ - x₁)

m = (17 - 7.5) / (220 - 30)

m = (9.5) / (190)

m = 0.05 = 5/100 = 1/20

m = 1/20

Plug m into your equation.

y = 1/20x + b

To find b, plug in a point for x and y.

17 = 1/20(220) + b

17 = 11 + b

b = 6

Plug b into your equation.

y = 1/20x + 6

Hope this helps!

John roller skates 48km in 3 hours. What is his average speed in kilometers per hour?

Answers

Answer:16km/hr

Explanation:

48km/3hr= 16km/hr

For the equation: D = -0.306c + 0.9979, what is the value of D when c= 1.67? Express answer with the correct number of sig figs?

Answers

Answer:

0.48688

Step-by-step explanation:

Let's solve your equation step-by-step.

d=(−0.306)(1.67)+0.9979

Step 1: Simplify both sides of the equation.

d=(−0.306)(1.67)+0.9979

d=−0.51102+0.9979

d=(−0.51102+0.9979)    (Combine Like Terms)

d=0.48688  

EASY WORK!!plz look at the photo and yes its easy for other people but not me for people asking.

Answers

Answer:

Here's a way this can help! If the graph it by two then any odd number will by by the middle, start by the origin and you'll be able to see it clearly.

Answer:

start by the origin and you'll be able to see it clearly

Step-by-step explanation:

uh

A college newspaper interviews a psychologist about student ratings of the teaching of faculty members. The psychologist says that the evidence indicates that the correlation between the research productivity and teaching rating of faculty members is close to zero. The paper reports this as Professor McDaniel said that good researchers tend to be poor teachers, and vice versa. Which statement in plain language (i.e. without the word correlation) correctly explains the psychologist's meaning?
A)There is little connection between research productivity and teaching rating.
B) While bad researchers tend to be good teachers, there is no similar relationship between good researchers and bad teachers.
C) While good researchers tend to be bad teachers, there is no similar relationship between bad researchers and good teachers.
D) Good researchers tend to be bad teachers and bad researchers tend to be good teachers.

Answers

Answer:

The correct option is A.

Step-by-step explanation:

As the psychologist states that there is no correlation found between teaching ratings and research productivity of the same faculty member, meaning that there is no significant relationship between the two. The paper's report states quite the opposite, that there is an inverse correlation. The statement that explains what the psychologist says correctly is A. There is little connection between teaching rating and research productivity.

I hope this answer helps.

alternate exterior angles theorem
vertical angles theorem
corresponding angles postulate
same side interior angles theorem
alternate interior angles theorem
are all the second awsner which one is it


i need this awnser

Answers

117°

same side interior angles theorem

Sally rents a life jacket for a one-time fee of $5. She then rents a canoe for $15 per hour. Write an expression that represents the total cost, in dollars, to rent the life jacket and the canoe for h hours.

Answers

Answer:

3.00/8

Step-by-step explanation:

because u simplify 15/5 and u get 3

Driving 65 mph, it takes Alicia 3 hours to reach the airport to go on a vacation. It then takes her 4 hours to get to her destination with the jet traveling at a speed of 400 mph. How many miles does Alicia travel to get to her destination?

Answers

Answer:

1,795 mi. traveled in total

Step-by-step explanation:

3 × 65 = 195 mi. driven by car

4 × 400 = 1,600 mi. flown by jet

1,600 + 195 = 1,795 mi. traveled in total.

How do you find the square root of -24 by simplifying

Answers

Answer:

you can't square root with negative numbers the answer will be math error and you cant simplify it unless it has no negative in it.

two step equations 12=18-d

Answers

Answer:

In this exercise, you need to get d:

12 = 18 - d

What we can do is substracting 18 in both sides:

12 - 18 = 18 - 18 - d

-6 =  -d

And then, we can say that d = 6..

3
What is the remainder when 2,308 is divided by
nine? Give your answer as a fraction.

Answers

Answer:

254 R 6

Step-by-step explanation:

Answer:

256 7/16

Step-by-step explanation:

2308/9 = 256 7/16

June's flower bed has a length of 8 feet and a width of seven eighths feet. Is the area of the flower bed larger, smaller, or equal to 8 square feet?

Answers

Answer:

it would be larger. the square footage is 56 square feet.

Step-by-step explanation:

What’s 59+(h-11) ??????

Whats the slope to this.

Giving brainliest. Correct answer

Answers

Answer:

m=-25

Step-by-step explanation:

m=Δh/Δt

(Im choosing for the difference in height and time (Δh and Δt) to be the difference between the data in the first two rows)

m=(4500-5000)/(20-0)

m=-500/20

m=-25

M = -25 is the correct answer

what do when you have 187,599742 and you have to take away 7937

Answers

Answer:

187,591,805

Step-by-step explanation:

187,599,742 - 7937 = 187,591,805

HTH :)

Help me on question 5!!! Plsss

Answers

Answer:

The answer is C

Step-by-step explanation:

use an open circle for "less than" or "greater than"and a closed circle for "less than or equal to" or "greater than or equal to".

1. What is the LCM of 15 and 100?
a. 400
b. 300
c. 200
d. 100​

Answers

Answer:

b. 300

       

i need 20 words this is filler                                  

The answer would be B.300

Hope this helps

Have a great day/night

Feel free to ask any questions

What is the value of the expression 5x – x + 8 when x = 2?

Answers

Answer:

16

Step-by-step explanation:

5x - x + 8

5(2) - 2 + 8

10 - 2 + 8

8 + 8

16

The answer is 16 I am sure

Someone please help me I’ll give out brainliest please dont answer if you don’t know

Answers

Answer:

its $63.96

Step-by-step explanation:

Using the formula (b) and replacing the given values:

Sale Price = Original Price - Amount Saved. So,

Sale Price = 79.95 - 15.99

Sale Price = $63.96 (answer).

This means the cost of the item to you is $63.96.

You will pay $63.96 for a item with original price of $79.95 when discounted 20%.

In this example, if you buy an item at $79.95 with 20% discount, you will pay 79.95 - 15.99 = 63.96 dollars.

Answer:

$63.96

Step-by-step explanation:

$79.95 = 100%

The jacket is on sale for 20% off, therefore it is 100% - 20% = 80% or 0.8

0.8 x $79.95 = $63.96

Please mark me brainliest.

17
There are 510 calories in 100 g of Twix.
There are 45 calories in 100 g of Coca Cola.
Lionel has 60 g of Twix and 140 g of Coca Cola for a morning snack
Work out the total number of calories in this morning snack.

Answers

Answer:

Amount of calories in 60g of Twix and 140g of Coca cola = 1020 calories

Step-by-step explanation:

Given:

Amount of calories in 100 g of Twix = 510 calories

Amount of calories in 100 g of Coca cola = 45 calories

Find:

Amount of calories in 60g of Twix and 140g of Coca cola

Computation:

Amount of calories in 60g of Twix = 60[510/100]

Amount of calories in 60g of Twix = 306 calories

Amount of calories in 140g of Coca cola = 140[510/100]

Amount of calories in 140g of Coca cola = 714 calories

Amount of calories in 60g of Twix and 140g of Coca cola = 306 + 714

Amount of calories in 60g of Twix and 140g of Coca cola = 1020 calories

using number line what is 4-5​

Answers

Answer:

-1

Step-by-step explanation:

4 - 5 = -1

Count:

4, 3, 2, 1, 0, -1

How many quarts will you get if you mix 5 gallons 5 quarts and 6 pints

Answers

Answer:

28

Step-by-step explanation:

There are 4 quarts in a gallon, and since we have 5 gallons that gives us 20 quarts. Then we add the 5 quarts to give us 25 quarts. Finally, there are 2 pints in quart, so that gives us 3 quarts. Add those last three quarts and we get 28 quarts in all.

Total quarts when you mix 5 gallons 5 quarts and 6 pints is, 28 quarts

We have to given that,

To find total quarts if you mix 5 gallons 5 quarts and 6 pints.

Since, 1 gallon = 4 quarts

Hence, 5 gallons = 5 x 4 = 20 quarts

And, 1 pints = 1/2 gallons

Hence, 6 pints = 6/2 gallons

                       = 3 gallons

So, Total quarts when you mix 5 gallons 5 quarts and 6 pints is,

20 + 5 + 3

28 quarts

Therefore, Total quarts when you mix 5 gallons 5 quarts and 6 pints is,

28 quarts.

Learn more about the measurement unit visit:

https://brainly.com/question/777464

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The table shows the results of a survey of 100 people selected at random
at an airport. Find the experimental probability that a person selected at
random is going to City C.


The experimetal probability that a person selected at random is going to city C is

Answers

Answer:

[tex]\frac{4}{25}[/tex]

Step-by-step explanation:

22/200 simpilfy is 4/25

The experimental probability that a person selected at random is going to city C is P ( C ) = 4/25 = 0.16

What is Probability?

The probability that an event will occur is measured by the ratio of favorable examples to the total number of situations possible

Probability = number of desirable outcomes / total number of possible outcomes

The value of probability lies between 0 and 1

Given data ,

Let the experimental probability that a person selected at random is going to city C is P ( C )

Now , the total number of people in the city = 100

The number of people going to city C = 16

So , P ( C ) = number of people going to city C / total number of people in the city

On simplifying , we get

P ( C ) = 16 / 100

P ( C ) = 4/25

P ( C ) = 0.16

Hence , the probability is 0.16

To learn more about probability click :

https://brainly.com/question/17089724

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Using distributive property write an expression using 6,7,5,&3 to equal 75

Answers

Answer:

(3*7-6)*5=75

(5+7)*6+3=75

Step-by-step explanation:

Why is sum of yi.ui zero

Answers

Answer:

Q

=

n

i

=

1

(

Yi

(

β

0

+

β

1

X

i))

2

a. Find the value of x
below

Answers

#The x side is same with 80° so

11x + 3 = 80°

11x = 80 - 3

11x = 77

x = 7

Answer : 7

Help pleaseeeeee!!!!!!!!

Answers

Answer:

2hklakkskamkaoaiaikanwkaisosossosooaolalao

b.1=(-2x2)+5

or you say x=2 and y=1

Step-by-step explanation:

bro bit a no answer ok

please mark me as brainlist

7. Look at the picture.
There are designated walkways for people at this beach. Why are these walkways constructed?
A) To keep people away from the other animals that live there.
B) To beautify the beach area in order to attract more tourists.
C) To protect the people, especially children, who visit the beach.
D) To protect sand dunes from foot-traffic that contributes to erosion.

Answers

Answer:

A

Step-by-step explanation:

Walkways are constructed to keep people away from the other animals that live there. Therefore, the correct option is option A.

What is walkway?

In American English, "walkway" refers to any artificial surface or building that facilitates the use of trails. A walkway is described as "a tunnel or path for strolling along, especially. a raised hallway connecting separate sections of such a building or perhaps a wide path inside a park or garden" in the New English American Dictionary.

In New Zealand, wherein "walkways vary significantly in nature, between short urban strolls, to easy seaside areas, to demanding tramps in the high country [mountains]," the word is used to designate a footpath. Walkways are constructed to keep people away from the other animals that live there.

Therefore, the correct option is option A.

To know more about walkway, here:

https://brainly.com/question/29102240

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Would the mass of a mouse more likely be 150 gram or 150 kilograms

Answers

150 grams because kilograms is wayyy to large and heavy. 150 kilograms to pounds would be 330.69 pounds and a mouse weighs no where near that
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