Answer:(a)
Step-by-step explanation:
Given
Principal amount 
Rate of interest 
Time 
Simple interest in 5 years



So total amount after five years
Answer:
bc c is too obvious a is Stoopid and d is way too much
Answer:
10 ft
Step-by-step explanation:
To figure out percents you can set it up like:
80/160 = x%/100%
Then cross multiply:
160x = 8000; now divide each side by 160 to isolate x, and you get x = 50%
The answer makes sense, because 80 is half (or 50%) of 160