Chapter 12

Complete each statement.


The difference in area between a circle with a 20" radius and a circle with a 30" diameter is ____________________.



If employee A worked 6.5 hours a day for 7 days, employee B worked 9 hours a day for 6 days, and employee C worked 8.5 hours a day for 8 days, the total hours worked is ____________________ hours.


Short Answer


Which is larger in area -- a triangle with a height of 30" and a base of 15" or a circle with a diameter of 9"?


An electrician needs to make 3 conduit runs from one side of a warehouse to the opposite side of the building. If each run is 138' long, how much will be spent on conduit if it comes in 10' lengths and costs $2.81 for each piece?


A carpenter needs to make 45 right triangles that have a height of 48" and a base measuring 48". How many 4' x 8' sheets of plywood are required for this job?


What is the difference in area between a square with sides measuring 16.0" and a circle with a diameter of 16.5"?


How many sheets of 4' x 8' drywall are required to make 15 pieces that are 3 1/2' 4 1/2'?


Which is larger -- the perimeter of a 2' x 4' rectangle or the circumference of a circle with a diameter of 36"?


Assuming the center of the first 2" x 4" stud is placed at the end of the bottom plate, how many studs are required for a 22' wall if the studs are placed 16" on center?


How much money would be left in a $500.00 tool account after purchasing a battery drill for $149.95, a set of drill bits for $29.99, and a circular saw for $49.86?

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