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:

15%

step-by-step explanation:

use the table and count the number of guesses that has two correct answers.

the following are two correct answers

10010, 01100, 11000

a total of 3 numbers having 2 correct guesses out of 20 questions.

probability of getting 2 correct guesses = the number of questions getting 2 correct answers / total number of questions.

= 3/20

to convert it into percent multiply by 100, we get

= 3/20 * 100

= 15%

the answer is 15%

you.

x is greater than 5

step-by-step explanation:

2x+7 is greater than 17

    -7                           -7

2x is greater than 10

divide by 2 each side

x is greater than 5