Measurement Error and Percentages Quiz

If an estimate was 3 hours but the actual time was 5 hours, what is the percent error?

• 80%

• 60%

• 40%

• 20%

A radar gun shows a speed of 103 mph, but the actual speed is 102.8 mph. What is the percent error?

• 0.019%

• 19%

• 0.19%

• 1.9%

If a trip took 48 minutes and the app estimated a 20% error, what was the app's estimated time?

• 38.4 minutes

• 40 minutes

• 45 minutes

• 50 minutes

A farmer underestimated the water in a tank by 16%. If the estimate was 25 gallons, how much was actually in the tank?

• 21 gallons

• 29.8 gallons

• 30 gallons

• 35 gallons

If Diego collected X kg of recycling and Lin collected 2/5 more, what is the equation for Lin's collection?

• Y = X + 2/5

• Y = X + 2/5X

• Y = 1 + 2/5X

• Y = 1.4X

If Lin biked X km and Diego biked 3/10 less, what is the equation for Diego's distance?

• Y = X - 0.3X

• Y = 0.7X

• Y = X - 3/10

• Y = X - 0.3

If Diego read for X minutes and Lin read 4/7 of that time, what is the equation for Lin's reading time?

• Y = 4/7X

• Y = X - 4/7

• Y = 0.57X

• Y = X + 4/7

In a diagram, if X is 5 and Y is 4, what is the percentage decrease?

• 30%

• 10%

• 20%

• 25%

If a window has a half-circle on top of a square with side 3 feet, what is the total area of the fabric needed?

• 12.5325 square feet

• 9 square feet

• 10.5 square feet

• 15 square feet

What is the radius of the half-circle if the square's side is 3 feet?

• 1 foot

• 1.5 feet

• 2.5 feet

• 2 feet