Sally jumped 2 times in 15 minutes. how many times could she jump in 10 hours?

About 400,000 people visited an art museum in december. what could be the exact number of people who visited the art museum?

Look at arnold's attempt to solve the equation for b: 3b = 12 b = 3 · 12 b = 36 describe the mistake that arnold made.

Peter measures the angles in a triangle. he finds that the angles are 95, 10 and 75. is he correct? explain your answer