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Percent Change - Quiz - Level G

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Micah is preparing for a piano recital. He practices for 50 minutes on Monday and

90 minutes on Wednesday.

80%

Step-by-step explanation:

Please consider the complete question:

Micah is preparing for a piano recital. He practices for 50 minutes on Monday and  90 minutes on Wednesday. By how much did she increase the time she practiced each day?

We will use percent change formula to solve our given problem.

Upon substituting our given values, we will get:

Therefore, Micah had increased the time by 80%.

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.