2 and 4/5 is 14/5 as a mixed number.
Using the Pythagorean theorem 4 would be the height and 8 would be the hypotenuse, you need to find the base
4^2 + X^2 = 8^2
16 x x^2 = 64
x^2 = 64-16
x^2 = 48
x = sqrt(48) = 6.92 feet ( round answer as needed )
Given the following question:
First expression:

Second expression:
Your sister would be 66.
When you are 10, your sister would be 6 (10-4=6)
60 years later, you would be 70, and your sister would still be 4 years younger.
Answer:
BD = 16
Step-by-step explanation:
32/BD = BD/8
BD² = 256
BD = 16