ANSWER
307½ gallons of water
EXPLANATION
The volume of the rectangular swimming pool is

where l=25ft and w=20½ ft.
when it is filled to a depth of 4½ ft ,then the height is , h=4½ ft.
We substitute these values into the formula to get:


If one cubic foot of water is 7½ gallons, then 2306.25 cubic feet will be

We need 307.5 gallons of water to fill the pool.
Answer:
84
Step-by-step explanation:
Combinations
nCr
n (objects) = 9
r (sample) = 3
9C3
n! / r! (n – r)!
9! / 3! (9 – 3)!=
9! / (3! * 6!)=
9*8*7*6!/ (3! * 6!)=
6! cancels out
9*8*7/3*2*1=
3*4*7=
12*7=
84
Answer:
One CD cost 14 dollars.
Step-by-step explanation:
4x=56
4/4x=56/4
x=14
Answer: 0.1037
Step-by-step explanation:
Given : Mean : 
Standard deviation : 
The formula to calculate the z-score is given by :-

For x = 97 miles per day ,

For x = 107 miles per day ,

The P-value =

Hence, the probability that a truck drives between 97 and 107 miles in a day = 0.1037
Answer:
she has 8 pencils left
Step-by-step explanation:
42-34=8