AMC8 1990

AMC8 1990 · Q13

AMC8 1990 · Q13. It mainly tests Fractions, Rates (speed).

One proposal for new postage rates for a letter was 30¢ for the first ounce and 22¢ for each additional ounce (or fraction of an ounce). The postage for a letter weighing 4.5 ounces was

一封信的新邮资方案是首盎司30美分，每额外盎司（或零头）22美分。重4.5盎司的信的邮资是

(A) 96¢ 96 美分

(B) $1.07 $1.07

(D) $1.20 $1.20

(E) $1.40 $1.40

Answer

Correct choice: (C)

正确答案：（C）

Solution

First ounce $0.30$. Additional 3.5 oz costs $4*0.22= 0.88$. Total \$1.18.

首盎司$0.30$。额外3.5盎司需 $4*0.22= 0.88$。总计\$1.18。

Topics