Question

9. Dan built a square patio with an area of 80 square feet. Estimate the length of each side of the patio to the nearest tenth.​

Answer 1

8.9

Explanation:

64<80<81

√64<√80<√81

8<√80<9

Now evaluate (8.8)² = 77 and 11/25

hence the next decimal place must be greater than eight. Hence 8.9 is an estimate to the nearest tenth.