Answer:8.8317687
Step-by-step explanation:
To find the square root of 78
We gets
√78=8.83176087
It should be C. the first floor is going to be 13 feet longer, so x squared +13 is going to be the first floor
Answer: see table below
<u>Step-by-step explanation:</u>

Answer:
False
Step-by-step explanation:
Let her sisters age be x.
=>sister .....x
Sarah.
twice x=2x. then less than 5
=> (2x-5 )
if Sarah = 15 years
by substation, 2x-5=15