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ira [324]
3 years ago
10

PLEASE I NEED HELP AGAIN ATTACHMENT BELOW

Mathematics
1 answer:
Anastaziya [24]3 years ago
5 0

Answer:

A.) 1/81

Step-by-step explanation:

This is your equation:

f(x) = 9^x

They want you to solve for x = -2, so substitute -2 in for x.

f(-2) = 9^-2

When you solve this, you get, 1/81.

So, the answer is A.)

I hope this helps! :)

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A medical testing laboratory saves money by combining blood samples for tests, so that only one test is conducted for several pe
Dovator [93]
The probability is 0.0334.

We will first find the probability that none of the 30 people sampled are infected.  Since the probability of one person being infected is 0.00114, the probability that someone is not infected is 1-0.00114 = 0.99886.  The probability that none of the 30 people are infected would be (0.99886)^30 = 0.966359.  We subtract this from one to find the probability that at least one person is infected:
1 - 0.966359 = 0.0334.
6 0
3 years ago
Josh plans on taking 3 trips this summer. he'll drive 159 miles, 163 miles, and 156 miles. Estimate the total miles he will driv
Alexxx [7]
159 + 163 + 156 = 478
You would then need to round it up to the nearest ten which would make it 480 miles. 
8 0
3 years ago
Read 2 more answers
isabella has this much amount of there are 2000 bucks 3 got lost she found 400 she made a deal with her friend so she gave her f
adell [148]

Answer:

599

Step-by-step explanation:

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4 0
4 years ago
If (a+10) and (a+20)are supplementary angles,find them​
motikmotik

Given:

(a+10) and (a+20) are supplementary

To find:

Each angle

Steps:

if 2 angles are supplementary that means they add up to 180°

(a + 10) + (a + 20) = 180

   a + 10 + a + 20 = 180

              2a + 30 = 180

                      2a = 180 - 30

                      2a = 150

                        a = 150/2

                        a = 75°

Now let's find value of each angle,

a + 10 = 75 + 10

          = 85°

a + 20 = 75 + 20

           = 95°

Therefore, the value of each angle is 85° and 95° respectively

Happy to help :)

If you need any help feel free to ask

4 0
3 years ago
The radius of a sphere is 7 in. What is the sphere's volume? Round to the nearest tenth,
bixtya [17]
Answer=1,436
Because:
4/3 x 3.14 x r'3(r x r x r)
4 0
3 years ago
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