Strategy 9: Estimate

(A) Quantity A is greater.
(B) Quantity B is greater.
(C) The two quantities are equal.
(D) The relationship cannot be determined from the information given.

Explanation

Without doing the exact computation, you can see that 54 percent of 360 is greater than  of 360, which is 180, and 180 is greater than Quantity B, 150. Thus, the correct answer is Choice A, Quantity A is greater.

A car got 33 miles per gallon using gasoline that cost $2.95 per gallon. Approximately what was the cost, in dollars, of the gasoline used in driving the car 350 miles?

(A) $10
(B) $20
(C) $30
(D) $40
(E) $50

Explanation

Scanning the answer choices indicates that you can do at least some estimation and still answer confidently. The car used  gallons of gasoline, so the cost was  dollars. You can estimate the product  by estimating  a little low, 10, and estimating 2.95 a little high, 3, to get approximately  dollars. You can also use the calculator to compute a more exact answer and then round the answer to the nearest 10 dollars, as suggested by the answer choices. The calculator yields the decimal  which rounds to 30 dollars. Thus, the correct answer is Choice C, $30.