t 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
19 minutes/mile
one-ninth minutes/mile
9 minutes/mile
9 minutes/mile
9 miles/minute
9 miles/minute
19 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
$0.50/book
$0.50/book
2 books/$1.00
2 books/$1.00
$2.00/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
5 miles/minute
5 miles/minute
15 minutes/mile
one-fifth minutes/mile
15 miles/minute
one-fifth miles/minute
5 minutes/mile
5 minutes/mile
At Office Mart, a box of 10 ballpoint pens costs $8. What is the unit price?(1 point)
Responses
1.25 pens/$1
1.25 pens/$1
$1.25/pen
$1.25/pen
0.80 pens/$1
0.80 pens/$1
$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
0.4 minutes/box
0.4 minutes/box
2.5 minutes/box
2.5 minutes/box
2.5 boxes/minute
2.5 boxes/minute
0.4 boxes/minute
2.5 boxes/minute
To convert the ratio of 36 minutes for 4 miles into a unit rate, you need to find how long it took Carla to run one mile.
To do this, you can divide the total time taken (36 minutes) by the number of miles run (4 miles).
36 minutes รท 4 miles = 9 minutes/mile
So, the correct answer is 9 minutes/mile.