Answer:
20,160
Step-by-step explanation:
Answer:

Step-by-step explanation:
- <u>Solve equation to find answer(s)</u>
<u></u>
Combine: 6z - 3z = 3z

Add: -2 + 3 = 1

Add 7 to both sides:

Simplify:

Divide both sides by 3:

Simplify:

- M -
Answer:

Step-by-step explanation:
Given that a medical study investigated the effect of calcium and vitamin supplements on the risk of older Americans for broken bones. A total of 389 older Americans who lived at home and were in good health were studied over a three-year period. While all of the 389 people took in at least 700 milligrams of calcium and 200 units of vitamin D through their normal diet, 187 of them were given additional supplements containing 500 milligrams of calcium citrate and 70 units of vitamin D daily. Of the 187 who took additional supplements, 11 of them suffered broken bones over the three-year period. Of the 202 older Americans who did not take the additional supplement, 26 of them suffered broken bones over the study period.
Group I Group II Total
n 187 202 389
favour x 11 26 37
The fraction of older Americans who were included in the study suffered broken bones during the three-year period
=Total x/total n
= 