Kali earned $40 for babysitting for 5 hours. At this rate, how much will she earn for babysitting for 7 hours?

Tina practice piano for 15 hours last month and 45 hours this month use multiplication to write a statement comparing me i was tina practice during the two months use addition to write a statement comparing the hours tina practice during the two months

Sum is 17 and their difference is 3

Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319