Nina can ride her bike 63,360 feet in 3,400 seconds, and Sophia can ride her bike 10 miles in 1 hour. What is Nina’s rate in mil
2 answers:
Answer:
Nina's rate is 12.7059 miles per hour (answer rounded up to four decimal places).
Step-by-step explanation:
Nina can ride her bike 63,360 feet in 3400 sec
1 mile = 5,280 feet
How many miles = 63,360 feet ?
Its 63,360 feet ÷ 5,280 feet × 1 mile = 12 miles
Nina's rate is 12 miles per 3400 seconds
1 hour = 3600 seconds
So in 1 hour, Nina rides × 12 miles = 12.7059 miles (rounded up to four decimal places)
Nina's rate is 12.7059 miles per hour (answer rounded up to four decimal places).
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<u>Answer:</u>
B. He multiplied the dividend by 100 instead of 10.
<u>Step-by-step explanation:</u>
Chen had to divide by
. To make it easier to divide, he thought of multiplying both the dividend and the divisor by 10.
Chen multiplied the divisor by 10 but mistakenly multiplied the dividend by 100 instead of 10.
So his whole division problem was changed.
Therefore, the correct answer option is B. He multiplied the dividend by 100 instead of 10.