If s denotes the length of the arc of a circle of radius r subtended by a central angle ?, find the missing quantity.r = 
feet, s = 7 feet, ? = ?
A. 
°
B. 
radians
C. 21 radians
D. 21°
Answer: C
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Sketch a line passing through the point and having slope m.(-2, 0), m = 1
A. 
B. 
C. 
D. 
Fill in the blank with one of the words or phrases listed below. 
An angle whose measure is between 90° and 180° is called a(n) 
angle.
A. angle B. acute C. adjacent D. obtuse
Find the expected value.Mr. Cameron is sponsoring an summer concert. He estimates that he will make $300,000 if it does not rain and make $60,000 if it does rain. The weather bureau predicts the chance of rain is 0.34 for the day of the concert. An insurance company is willing to insure the concert for $150,000 against rain for a premium of $30,000. If he buys this policy, what are his expected earnings from the concert?
A. $180,000 B. $300,000 C. $270,000 D. $239,400
Solve the problem.If the average cost per unit C(x) to produce x units of plywood is modeled by C(x) = 
,what is the unit cost for 40 units?
A. $22.50 B. $0.75 C. $4.00 D. $12.86