Evaluate the integral using an appropriate trigonometric substitution. 
What will be an ideal response?
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At one high school, the mean time for running the 100-yard dash is 
with a standard deviation of 0.9 seconds. The times are normally distributed.Find the percent of times that are between 15.2 and 16.1 seconds.
A. 34% B. 50% C. 68% D. 13.5%
For the polynomial, list each real zero and its multiplicity. Determine whether the graph crosses or touches the x-axis at each x -intercept.f(x) = 5(x2 + 6)(x2 + 3)2
A. No real zeros
B. 
, multiplicity 1, crosses x-axis; -
, multiplicity 1, crosses x-axis;
, multiplicity 2, touches x-axis; -
, multiplicity 2, touches x-axis
C. -6, multiplicity 1, touches x-axis; -3, multiplicity 2, crosses x-axis
D. -6, multiplicity 1, crosses x-axis; -3, multiplicity 2, touches x-axis
Solve the problem.The owners of a candy store want to sell, for $6 per pound, a mixture of chocolate-covered raisins, which usually sells for $3 per pound, and chocolate-covered macadamia nuts, which usually sells for $8 per pound. They have a 
barrel of the raisins. How many pounds of the nuts should they mix with the barrel of raisins so that they hit their target value of $6 per pound for the mixture?
A. 80 lb B. 75 lb C. 65 lb D. 70 lb
Solve the problem.A contestant on a TV game show had $800 at the start of the show. She answered a $1000 question incorrectly, and later answered a $500 question correctly. What was her score after answering these two questions?
A. $300 B. -$400 C. $400 D. -$300