Question

a contractor uses this table to calculate the cost of paving rectangular site b. here is the contractor’s work: 60 ft × 40 ft × $6 per sq ft = $14,400 a project manager reviews the contractor’s work. at which step will the project manager find an error? a) checking the work against the data for recording errors. b) checking that the correct formula was used for this situation and the order of operations was followed. c) checking the work for calculation errors. d) the contractor’s work is correct. | site | length | width | fencing cost | paving cost | |---|---|---|---|---| | site a | 50 ft | 20 ft | $5 per ft | $9 per sq ft | | site b | 60 ft | 40 ft | $6 per ft | $8 per sq ft |

Explanation:

Step1: Verify paving cost rate

From the table, Site B's paving cost is $\$8$ per sq ft, not $\$6$ per sq ft.

Step2: Check contractor's formula use

The contractor used the wrong rate and miscalculated. The error is in formula/rate selection.

Step3: Evaluate review steps

The error stems from using incorrect data (wrong paving rate) and misapplying the cost formula, so checking formula/rate use will find it.

Answer:

B) Checking that the correct formula was used for this situation and the order of operations was followed.