Question

HELP PLEASE!

Answer 1

It would be 3.87,to the nearest hundred cause the real length is √15

Answer 2

For this problem, we can use the pythagorean theorem. The formula for that is:

a²+b²=c²      where a and b are side lengths and c is the hypotenuse

Plug in the data that we know

7²+b²=8²
49+b²=64
subtract 49 from both sides
b²=15
b=√15
b=3.8729
round to the nearest hundredth
b=3.88 units