63 1/4 divided by 2 1/5 is 253/40
We know that the volume of a sphere is:
V
=
4
3
π
r
3
where
r
=
10
2
=
5
ft
is the radius;
we need half of this, so we use:
V
2
=
2
3
π
r
3
=
261.8
ft
3
giving a total weight of water of:
W
=
261.8
⋅
62.4
=
16
,
336
pounds
Answer:
We conclude that the average American shower needs 2984.8 minutes and 6260.8 gallons of water during the year.
Step-by-step explanation:
We know that the average American shower lasts for 8.2 minutes and uses 17.2 gallons of water. A person showers once a day for a year.
We know that one year have 52 weeks, and one week have 7 days.
We calculate:
8.2 · 7 · 52= 2984.8 minutes.
17.2 · 7 · 52= 6260.8 gallons.
We conclude that the average American shower needs 2984.8 minutes and 6260.8 gallons of water during the year.
we are given
The water level in Ricky lake changes at an average of -7/48 inch for 1 year
It means that
In 1 year , the water level changes at 
and we have to find the water level change after 5 years
so, we can multiply both sides by 5
In 5*1 year , the water level changes at 
In 5 years , the water level changes at 
Hence,
the water level change after 5 years is ........Answer
It will take 8 hours to fill the swimming pool. There is already 9,000 gallons filled, that leaves you with 12,000. 12,000 divided by the rate per hour 1,500. That gives you 8.
