Manuel has $50 in his bank account. Starting this week, he will deposit $30 into the account each week. If Manuel does not take any money out of his account, how many
weeks will it take for the total amount of money in his account to reach $320?

9 weeks

Step-by-step explanation:

50+ (30x9)=320

i leave the calculator work to you.

7. diameter 4 miles, circumference 4π miles

8. radius 0.2 miles, circumference 0.4π miles

[this is a bad problem because the actual radius of a car on the track is less than 0.2 miles so the answer is less than 0.4π miles]

9. radius 6 feet, circumference 12π feet

10. diameter 14 cm, circumference 14π cm

11. diameter 4.8 feet, circumference 4.8π feet