Question

Use the R.I.C.E. strategy.

1. Mr. Bromell is going to buy tacos for his class of 25 students. He plans on allowing each student to have four tacos. The taco combo pack" has 10 tacos each and costs $5.00 per pack. How many packs of tacos does Mr. Bromell need to buy?
2. A new building needed 18 windows. The builder has already installed three of them. If it takes 4 hours to install each window, how long will it take the builder to install the remaining windows?
3. Sammy paid for three school lunches, which cost $2.75 each. He gave the cashier $20.00. How much change will Sammy receive from the cashier?

Answer 1

Mr. Bromell needs to buy 10 packs of tacos. The builder will take 60 hours to install the remaining windows. Sammy will receive $11.75 in change from the cashier.

Step-by-step explanation:

R.I.C.E. strategy:

1. Mr. Bromell needs to buy:
   Number of tacos = Number of students × Number of tacos per student
   Number of tacos = 25 × 4 = 100 tacos
   Number of packs of tacos = Number of tacos ÷ Tacos per pack
   Number of packs of tacos = 100 ÷ 10 = 10 packs
   Therefore, Mr. Bromell needs to buy 10 packs of tacos.
2. The number of remaining windows to install is:
   Number of remaining windows = Total number of windows - Number of already installed windows
   Number of remaining windows = 18 - 3 = 15 windows
   The time required to install remaining windows = Number of remaining windows × Time required to install each window
   The time required to install remaining windows = 15 × 4 = 60 hours
   Therefore, it will take the builder 60 hours to install the remaining windows.
3. The amount of change Sammy will receive is:
   Total amount paid = Number of lunches × Cost per lunch
   Total amount paid = 3 × $2.75 = $8.25
   Change received = Amount given - Total amount paid
   Change received = $20.00 - $8.25 = $11.75
   Therefore, Sammy will receive $11.75 in change.