Simplify the expression. Write the result without using negative exponents. (Assume all variables represent nonzero real numbers.)y-6 ? y-5
A. 
B. 
C. y11
D. 
Answer: D
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Solve.The function s(t) = -0.027t2 + 1.74t + 15.7 models the average starting salary for police officers in a large U.S. city for the years 1975 through 2000, where t is the number of years since 1975 and s(t) is in thousands of dollars. Graph the function for the years 1975 through 2000.
A. 
B. 
C. 
D. 
Simplify the expression. Assume that all variables are positive when they appear.20
- 4
A. -4
B. 20
- 4
C. 16
D. 4
Find the vertex, the focus, and the directrix of the parabola.(x + 4)2 = -20(y - 2)
A. V: (-4,2); F: (-9,-3); D: y = 7 B. V: (2,-4); F: (-4, -3); D: y = 7 C. V: (-4,2); F: (-4, -3); D: y = 7 D. V: (-4,3); F: (-4, -3); D: y = 7
Convert the angle in radians to degrees. Round to two decimal places.
? radians
A. 71° B. 72° C. 73° D. 74°