Answer:
D
Step-by-step explanation:
Area = pi r^2
d = 10
r = d/2
r = 5
Area = 3.14 * 5^2
Area = 3.14 * 25
Area = 78.5
A) A=500(1+0.015)^t
b)800=500(1.015)^t
800/500=1.015^t
t=log(800/500)/log(1.015)
t=31.6 years
Let's say one pipe can fill 1/10th of the swimming pool per hour; and the other can fill 1/8th of the pool per hour. Then, working together they can do:
1/8+1/10=5/40+4/40=9/40 pool per hour
1 pool/(9/40) pool/hour=40/9 hours for one pool when the pipes are working together
☺☺☺☺
Answer: 44
Step-by-step explanation: .8X55 = 44
Answer: 1. 3x=15. 2. is correct
3. X=15