SAT数学备考经典模拟题训练21

>>SAT数学模拟题：SAT数学备考经典模拟题训练21

>>SAT考试辅导

1. Courier charges for packages to a certain destination are 65 cents for the first 250 grams and 10 cents for each additional 100 grams or part thereof. What could be the weight in grams of a package for which the charge is $1.55 ?

A. 1155

B. 1145

C. 1040

D. 950

E. 259

1.Correct Answer: B

Explanation:

The weight will be 250g plus (1.55 - 0.65)/0.10 units of 100g

250 + 900 = 1150

This is the maximum weight that can be sent at that price. But, weights exceeding

250 + 800 will also get charged this amount (that is what the ‘part thereof’ implies).

Hence a package weighing 1145 (ans. B) will be charged $1.55

2.Correct Answer: C

Explanation:

Imagine a third parallel line drawn through C. The angle ACD will be made of two angles, one alternate to BAC, and therefore = 30. The other is alternate to CDE and therefore = 50. Total for angle ACD = 80

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