Given:
Consider the complete question is "A speed walker covered
mi in
hour. How far will he walk in 3/4 hours if he walks twice as fast?"
A speed walker covered
mi in
hour.
To find:
Distance covered by him if in 3/4 hour if he walks twice as fast.
Solution:
We have,

It means a speed walker covered
mi in
hour.
If the speed is twice then he can cover double distance is same time.
Distance covered by him if in 3/4 hour if he walks twice as fast is

Therefore, distance covered by him is 9 mi.
Answer:
21
Step-by-step explanation:
Common ratio, r = (-125)/625 = -0.2
First term, a = 625
7 term
= ar^6
= 625(-0.2)^6
= -0.04
9:4:5.....added together = 18
9/18 (72) = 648/18 = 36
4/18 (72) = 288/18 = 16
5/18 (72) = 360/18 = 20
so we have 36:16:20