Answer:
2520 gallons
Step-by-step explanation:
3000 gallons -780 gallons drained over 6 hours then add 300 gallons over three hours = 2520 gallons
There are 15 years was his money invested.
<h3>
What is simple interset?</h3>
Simple Interest is an easy method of calculating the interest for a loan/principal amount.
Given
Frank invests $1,000 in simple interest investment account that pays 8% a year.
After a number of years, he withdraws his balance of $2,200.
The number of years was his money inversted is;

Where p is the principal amount, r is the rate of interest, I is the amount and t is the time.
Substitute all the values in the formula;

Hence, in the 15 years was his money invested.
To know more about investing click the link given below.
brainly.com/question/26677076
Answer:
7.5 +9.63.
7.5+9.63. + N
17.13N
is the answer
Step-by-step explanation:
Answer:
first you would find the sum of all the people who DONT have grey hair (15)
5:15 or if simplified it would be 1:3 pls mark brainliest if correct :D
Answer:
A 5c+ 275 > 500
Step-by-step explanation: