Solve the problem.Stevie bought a stereo for $215 and put it on sale at his store at a 50% markup rate. What was the retail price of the stereo?
A. $430.00
B. $322.50
C. $315.00
D. $222.50
Answer: B
Mathematics
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The function f(x) changes value when x changes from x0 to x0 + dx. Find the approximation error 
. Round your answer, if appropriate.f(x) = 
, x0 = 5, dx = 0.04
A. 0.00896 B. 0.00001 C. -0.00896 D. -0.00001
Mathematics
Use the product rule to simplify.
A. 7
B. 17
C. 49
D. 7
Mathematics
Use the definition or identities to find the exact value of the indicated trigonometric function of the acute angle ?.cos ? = 
Find sin ? and tan ?.
What will be an ideal response?
Mathematics
Solve the equation.8x - (4x - 1) = 2
A. 
B. 
C. 
D. 
Mathematics