Solve the problem.What is the cost, in dollars, of 20.5 gallons of gasoline at 115.9 cents per gallon? Round your answer to the nearest cent.
A. $238.60
B. $237.60
C. $24.76
D. $23.76
Answer: D
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Find the exact value of the expression.cos 40° cos 20° - sin 40° sin 20°
A. 
B. 
C. 
D. 
Solve the problem.Let angle POQ be designated ?. Angles PQR and VRQ are right angles. If ? = 45°, find the exact length of PQ. 
A. 1
B. 
C. 
D. 0
Translate the sentence into a mathematical equation. Be sure to identify the meaning of all symbols.The surface area of a sphere is 4? times the square of the radius.
A. If S represents the surface area and r the radius, then 4?S = r2. B. If S represents the surface area and r the radius, then S = ?r2. C. If S represents the surface area and r the radius, then S = 4?r2. D. If S represents the surface area and r the radius, then S = 4?r.
Use the remainder theorem and synthetic division to find P(k).k = 2; P(x) = -x3 + 3x2 + 2
A. -9 B. 6 C. 23 D. -6