Find an equation for the graph.
A. y = -5 sin 
B. y = -5 sin (3x)
C. y = 5 cos 
D. y = -5 sin 
Answer: A
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Use the total differential dz to approximate the change in z as (x, y) moves from P to Q. Then use a calculator to find the corresponding exact change ?z (to the accuracy of your calculator).tan-1 (x2y;) P(1, 1), Q(0.97, 1.02)
A. dz = 0.02; ?z = 0.0205521041 B. dz = -0.02; ?z = -0.0205521041 C. dz = 0.2; ?z = -0.205521041 D. dz = -0.2; ?z = -0.205521041
Use the Consumer Price Index below to answer the question.
Find the inflation rate from 1986 to 1987. If necessary, round values to the nearest tenth.
A. 1.0% B. 4% C. 3.6% D. 3.5%
Find the product and write the answer in simplest form. Assume variables represent nonnegative values.
? 
A. 12
B. 20
C. 12
D. 20
Use the quadratic formula to solve the equation.7x2 = -12x - 3
A. 
, 
B. 
, 
C. 
, 
D. 
, 