Question

1. in 1 minute a traffic light flashes 45 times. how many times will it flash in half an hour?
2. mrs. thomas paid $286 at a paint store for paint that costs $26 a gallon. how many gallons of paint did she buy?
3. a lighthouse flashes its beacon light at a rate of 48 flashes per minute. how many times will the light flash in 30 minutes?
4. an automobile factory can make 18 cars in 8 hours. at this rate, how many cars can the factory assemble in 14 hours?

Explanation:

Question 3

Step1: Convert half an hour to minutes

Half an hour is 30 minutes.

Step2: Calculate total flashes in 30 minutes

The light flashes 45 times per minute. So in 30 minutes, it will flash $45\times30 = 1350$ times.

Step1: Recall the formula for quantity

Quantity = Total cost / Cost per gallon.

Step2: Substitute the values

Total cost is $286, cost per gallon is $26. So quantity = $\frac{286}{26}= 11$ gallons.

Step1: Identify the rate and time

Rate is 48 flashes per minute, time is 30 minutes.

Step2: Calculate total flashes

Total flashes = Rate × Time = $48\times30 = 1440$ times.

Answer:

1350

Question 4