20= -4t
20/-4= t
-5 = t
t is -5
Answer: 
Explanation:
The area of a triangle A can be calculated as A=(height)x(base)/2
We know the height is 6x.
We know 
So the equation becomes (using |AC| as the base length):

The base is 
Answer: -10/9
Step-by-step explanation: is this what you were looking for
A=2πrh+2πr2=2·π·6·25+2·π·6^2 so the answer is D
The answer would be 17/18 in lowest terms.