This question has two parts. first answer part a, then answer part b. part a

silvia does 5 sit-ups on the first day of her exercise program. each day thereafter she does twice as many sit-ups as the day before.

(a)write a recursive formula that models the number of sit-ups she does each day.
(b)use your formula to find the number of sit-ups silvia does on each of the first 6 days.

A.

B. 160

Step-by-step explanation:

Silvia does 5 sit-ups on the first day of her exercise program. Each day thereafter she does twice as many sit-ups as the day before. Hence

1st day - 5 sit-ups

2nd day - 10 sit-ups

3rd day - 20 sit-ups

...

A.

The recursive formula that models the number of sit-ups she does each day is

B.

A.

B.

Step-by-step explanation:

We are given that

Silvia does sit-ups on the first day of her exercise program=5

A.we have to find the recursive formula that models the number of sit up she does each day.

According to question

Hence, the recursive formula is given by

B.We have to find the number of sit-ups Silvia  does on each of the first 6 days by using this formula .

i leave the calculator work to you.

7. diameter 4 miles, circumference 4π miles

8. radius 0.2 miles, circumference 0.4π miles

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9. radius 6 feet, circumference 12π feet

10. diameter 14 cm, circumference 14π cm

11. diameter 4.8 feet, circumference 4.8π feet