Answer:
The value of x is : 
Option C is correct.
Step-by-step explanation:
We need to find value of x
We are given Perpendicular = 8
Hypotenuse = x
and Ф= 45°
Using trigonometric identity

Putting values and finding x

So, the value of x is : 
Option C is correct.
The closest estimate for 289 is 300 the closest estimate for 8 is 10
B is the answer,the output each time is plus 12.5
3/4 + 1/8
If you also need to solve it the answer is 7/8