Week 20 Practice Problems

A music store marks up the instruments it sells by 30%.

If the store bought a guitar for $45, what will be its store price?

DO NOT INCLUDE A LABEL.

A music store marks up the instruments it sells by 30%.

If the price tage on a trumpet says $104, how much did the store pay for it?

DO NOT INCLUDE A LABEL.

A family eats at a restaurant. The bill is $42. The family leaves a tip and spends $49.77.

How much was the tip in dollars?

DO NOT INCLUDE A LABEL.

A family eats at a restaurant. The bill is $42. The family leaves a tip and spends $49.77.

How much was the tip as a percentage of the bill?

DO NOT INCLUDE A LABEL.

Jada measured the lake to be 16 meters. The depth of a lake is actually 15.8 meters. What is the percent error?

DO NOT INCLUDE A LABEL.

A watermelon weighs 8,475 grams. A scale measured the weight with an error of 12% under the actual weight. What was the measured weight?

DO NOT INCLUDE A LABEL.

Noah's oven thermometer gives a reading that is 2% greater than the actual temperature. If the actual temperature is 325⁰F, what will the thermometer reading be?

DO NOT INCLUDE A LABEL.

Noah's oven thermometer gives a reading that is 2% greater than the actual temperature. If the thermometer reading is 76⁰F, what is the actual temperature?

ROUND TO THE NEAREST WHOLE NUMBER.

DO NOT INCLUDE A LABEL.