Solve the problem.Mrs. Boyd has a desk full of quarters and nickels. If she has a total of 21 coins with a total face value of $2.45, how many of the coins are nickels?
A. 7 nickels
B. 14 nickels
C. 12 nickels
D. 16 nickels
Answer: B
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Find the indicated derivative. Assume that x is restricted so that ln is defined.
if y = ln (x + 3)4
A. 
B. 
C. 
D. 
The speed for certain animals is related to the stride length by a power function. The value of the power in this function is 
. If the speed is multiplied by 1.77, how is the stride length affected? Round your answer to two decimal places if necessary.
?
A. Stride length is multiplied by 1.83. B. Stride length is multiplied by 2.53. C. Stride length is multiplied by 1.71. D. Stride length is multiplied by 2.33.
Find the value of the radical expression.3
A. 48 B. -48 C. -12 D. 12
Write the solutions that can be read from the simplex tableau.
A. s2 = 13, s1 = 18, s3 = 17, z = 7; x1, x2 = 0 B. s2 = 13, s1 = 18, x1 = 17, z = 7; x2, s3 = 0 C. s3 = 13, s1 = 18, x1 = 17, z = 7; x2, s2 = 0 D. s2 = 13, s3 = 18, x1 = 17, z = 7; x2, s1 = 0