Volunteers put together 40 school-supply kits in 8 minutes. At this rate, how many could they put together in 30 minutes? Solve this problem using a unit rate.
A.6 school-supply kits
B.9,600 school-supply kits
C.150 school-supply kits
D.10.67 school-supply kits
40/8 * 30 = 150
To solve this problem using a unit rate, you first need to find the number of school-supply kits that can be put together in one minute.
Given that 40 school-supply kits were put together in 8 minutes, you can find the rate as follows:
Number of school-supply kits per minute = Number of school-supply kits / Number of minutes
Number of school-supply kits per minute = 40 school-supply kits / 8 minutes
Number of school-supply kits per minute = 5 school-supply kits
Now that you have the rate of 5 school-supply kits per minute, you can use it to determine the number of school-supply kits that can be put together in 30 minutes.
Number of school-supply kits in 30 minutes = Number of minutes × Number of school-supply kits per minute
Number of school-supply kits in 30 minutes = 30 minutes × 5 school-supply kits
Number of school-supply kits in 30 minutes = 150 school-supply kits
Therefore, the correct answer is C. Volunteers could put together 150 school-supply kits in 30 minutes.
To solve this problem using unit rate, we need to find out how many school-supply kits can be put together in 1 minute.
We know that in 8 minutes, the volunteers can put together 40 school-supply kits, so in 1 minute they can put together 40/8 = 5 school-supply kits.
Now that we know the rate at which the volunteers can put together the kits, we can find out how many they can put together in 30 minutes: 5 kits/minute * 30 minutes = 150 school-supply kits.
Therefore, the volunteers can put together 150 school-supply kits in 30 minutes.
The correct answer is option C. 150 school-supply kits.