Gina has $72 in $1 bills, $5 bills, and $20 bills. if she has three times as many $1 bills as she has $5 bills, and only half as many $20 bills as $5 bills, how many of each type of bill does each have?

they charge the same amount at 20 minutes.

step-by-step explanation:

3,6 and 7.

step-by-step explanation:

a) unit place of 37 is 7

so the unit place of cube of 37 will be

7³= 343=3

the answer is 3.

b) unit place of 56 is 6, so the unit place of cube of 56 will be

6³= 216=6

the answer is 6.

c) unit place of 133 is 3, so the unit place of cube of 133 will be

3³= 27= 7.

the answer is 7.