Does regular exercise decrease the risk of cancer? A researcher finds 200
women over 50 who exercise regularly, pairs each with a woman who has a
similar medical history but does not exercise, then follows the subjects for 10
years to see which group develops more cancer. This is a *
A-survey
B-retrospective study
C-prospective study
D-randomized experiment

A survey

Step-by-step explanation:

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.

answer: 94

step-by-step explanation: 79+91+92+94+94 = 450 divided by 5 (since there are 5 number that are being added) = 90