It took Carla 36 minutes to run four miles. Convert this ratio into a unit rate by finding how long it took Carla to run one mile.(1 point)
Responses
9 minutes/mile
9 minutes/mile
19 miles/minute
one-ninth miles/minute
19 minutes/mile
one-ninth minutes/mile
9 miles/minute
9 minutes/mile
At a used book sale, Miss Chen bought a box of 20 assorted books for $40. What was the cost per book?(1 point)
Responses
0.5 books/$1.00
0.5 books/$1.00
2 books/$1.00
2 books/$1.00
$2.00/book
$2.00/book
$0.50/book
$2.00/book
It took Liam 15 minutes to ride his bike three miles. Convert this ratio into a unit rate by finding how long many minutes did he take to travel one mile.(1 point)
Responses
15 minutes/mile
one-fifth minutes/mile
5 minutes/mile
5 minutes/mile
15 miles/minute
one-fifth miles/minute
5 miles/minute
5 minutes/mile
At Office Mart, a box of 10 ballpoint pens costs $8. What is the unit price?(1 point)
Responses
0.80 pens/$1
0.80 pens/$1
1.25 pens/$1
1.25 pens/$1
$1.25/pen
$1.25/pen
$0.80/pen
$0.80/pen
For a Thanksgiving food drive, volunteers packed 50 boxes of food in 20 minutes. How many boxes did they pack per minute?(1 point)
Responses
2.5 boxes/minute
2.5 boxes/minute
0.4 boxes/minute
0.4 boxes/minute
0.4 minutes/box
0.4 minutes/box
2.5 minutes/box
2.5 boxes/minute
To convert the ratio into a unit rate, divide the total time taken (36 minutes) by the distance covered (4 miles).
36 minutes / 4 miles = 9 minutes/mile
Therefore, it took Carla 9 minutes to run one mile.
So, the correct answer is: 9 minutes/mile.