Suppose the number y of medical degrees conferred in the United States can be modeled by 
, for 
, where t is the time in years, with 
style="vertical-align:middle;" /> corresponding to 1972. Use the test for increasing and decreasing functions to estimate the years during which the number of medical degrees is increasing and the years during which it is decreasing.
?
A. The number of medical degrees is increasing from 1972 to 1989 and 1997 to 2005, and decreasing during 1989 to 1997.
B. The number of medical degrees is increasing from 1972 to 1988 and 1996 to 2005, and decreasing during 1988 to 1996.
C. The number of medical degrees is increasing from 1972 to 1989 and 2001 to 2005, and decreasing during 1989 to 2001.
D. The number of medical degrees is increasing from 1972 to 1990 and 1996 to 2005, and decreasing during 1990 to 2001.
E. The number of medical degrees is increasing from 1972 to 1989 and 1995 to 2005, and decreasing during 1989 to 1995.
Answer: C
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Find the inverse of the function and state its domain and range .{(-9, -3), (3, 9), (-1, 6), (1, -6)}
A. {(-6, -1), (-1, 3), (-3, -9), (6, 1)}; D = {-6, -1, -3, 6}; R = {-1, 3, -9, 1}
B. {(-6, -1), (9, 3), (-3, 3), (6, 1)}; D = {(-6, 9, -3, 6}; R = {-1, 3, 1}
C. {(-3, -9), (9, 3), (6, -1), (-6, 1)} D = {-3, 9, 6, -6}; R = {-9, 3, -1, 1}
D. 
D = { -9, 3, -1, 1}, R = 
Use a graphing utility to find the equation of the line of best fit. Round to two decimal places, if necessary.
A. y = 0.85x + 3.07 B. y = 0.75x + 4.07 C. y = 0.95x + 3.07 D. y = 0.75x + 5.07
Multiply and simplify. Assume all variables represent nonnegative real numbers. Write your answer in radical notation.
A. x8(y + z)7
B. x7(y + z)7
C. x7(y + z)7
D. x8(y + z)8
Find an equation for the circle.Endpoints of a diameter (-9, 5), (1, -3)
A. x2 + (y - 1)2 = 25 B. (x + 4)2 + y2 = 16 C. (x + 4)2 + (y - 1)2 = 41 D. (x - 1)2 + (y + 4)2 = 41