Translate the percent problem to a basic percent equation using x for the unknown value. Do not solve.What number is 54% of 68?
A. 0.54 + 68 = x
B. x ? 0.54 = 68
C. x ? 68 = 0.54
D. 0.54 ? 68 = x
Answer: D
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Solve the problem.The range x of a projectile fired with velocity vo at an angle ? with the horizontal is given by 
where g is gravitational acceleration. Determine x in terms of vo and g for ? = 21°.
A. 
B. 
C. 0.67
D. 
Divide using synthetic division.
A. x - 9 B. -7x + 9 C. -9x + 6 D. 7x - 9
Solve the problem.Regrind, Inc. regrinds used typewriter platens. The variable cost per platen is $1.90. The total cost to regrind 90 platens is $500. Find the linear cost function to regrind platens. If reground platens sell for $9.60 each, how many must be reground and sold to break even?
A. C(x) = 1.90x + 329; 29 platens B. C(x) = 1.90x + 329; 43 platens C. C(x) = 1.90x + 500; 65 platens D. C(x) = 1.90x + 500; 44 platens
Fill in the blank with one of the words or phrases listed below.
Two numbers whose product is 1 are called 
.
A. opposites B. reciprocals C. the same D. reversed