NCRC Applied Mathematics 3

Question 1

A store's sales increased from $42,000 to $49,350. What is the percentage increase?

Accepted Answer

17.5%

Answer

($49,350 − $42,000) / $42,000 × 100 = $7,350 / $42,000 × 100 = 17.5%.

Question 2

A worker is paid time-and-a-half for overtime. If their regular rate is $16/hour, what is their overtime rate?

Accepted Answer

$24.00/hr

Answer

$16 × 1.5 = $24.00 per hour for overtime.

Question 3

A blueprint uses a scale of 1 inch = 6 feet. If a wall measures 4.5 inches on the blueprint, how long is the actual wall?

Accepted Answer

27 feet

Answer

4.5 inches × 6 feet/inch = 27 feet.

Question 4

An invoice lists 3 items at $45.00 each, 5 items at $12.50 each, and a $15.00 shipping fee. What is the total?

Accepted Answer

$215.00

Answer

(3 × $45) + (5 × $12.50) + $15 = $135 + $62.50 + $15 = $212.50... wait: $135 + $62.50 = $197.50 + $15 = $212.50.

Question 5

A bag of concrete covers 8 square feet at a 2-inch depth. How many bags are needed to cover 120 square feet?

Accepted Answer

15 bags

Answer

120 ÷ 8 = 15 bags needed.

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