Operations with Rational Numbers

Emiline earns $6.50 for each hour of work as a babysitter. How much will she earn for working 5.5 hours as a babysitter?

A group of 4 friends paid a total of $50.24 for tickets to a museum. Each friend paid the same amount for a ticket. How much did each friend pay for their ticket?

Jaida worked 21 1/2 hours last week. She earned $11.60 per hour of work. How much money did Jaida earn last week?

Jaida worked 21 1/2 hours last week. She earned $11.60 per hour of work. How much money did Jaida earn last week?

(a)  

What is the value of $$\frac{4}{15}\div\frac{2}{3}$$

A baby weighed 7.25 lb at birth. After 8 months, the baby weighed $$2\frac{1}{2}$$ times its birth weight. How many pounds did the baby weigh at the end of 8 months?

A recipe for cookies requires $$\frac{2}{3}$$ cup of butter. Rama wants to make $$\frac{3}{4}$$ of the recipe. How many cups of butter should Rama use to make the recipe?