1 On a trip, a student drove 40 miles per hour for 2 hours and then drove 30 miles per hour for 3 hours. What is the studentís average rate of speed, in miles per hour, for the whole trip?

(1) 34       (3) 36
(2) 35       (4) 37

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2 A ball is thrown straight up at an initial velocity of 54 feet per second. The height of the ball t seconds after it is thrown is given by the formula h(t) = 54t - 12t2. How many seconds after the ball is thrown will it return to the ground?

(1) 9.2            (3) 4.5
(2) 6               (4) 4

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3 What is the period of the function y = 5 sin 3x?

(1) 5                (3) 3
(2) 2π/5            (4) 2π/3

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4 A cellular telephone company has two plans. Plan A charges $11 a month and $0.21 per minute. Plan B charges $20 a month and $0.10 per minute. After how much time, to the nearest minute, will the cost of plan A be equal to the cost of plan B?

(1) 1 hr 22 min         (3) 81 hr 8 min
(2) 1 hr 36 min         (4) 81 hr 48 min

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