Answer:there is no solution. The question is wrong
Step-by-step explanation:
No, this is not valid. In the picture below,

is a vertical angle with

. But

is not
-16t^2+400=0
16t^2=400
take square root on both sides.

4t=20
t=20/4
t=5
Answer:
Oh, how morbid these interest problems are.
Are you asking how much they would recieve in a year?
If so:
40000/100=400
400*60=$24000 a year