Convert the rectangular equation to polar form.x2 + y2 - 4x = 0
A. r sin2? = 4 cos ?
B. r cos2? = 4 sin ?
C. r = 4 sin ?
D. r = 4 cos ?
Answer: D
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Use a graphing calculator to solve the problem.Let f(x) = sin 
+ cos x on the interval I = (0, 7). Use the graph to estimate where f''(x) < 0 on I.
A. (0, 1.77) ? (4.52, 7) B. (0, 5.77) C. (1.77, 4.52) D. (0, 3.14) ? (3.14, 7)
Evaluate using a calculator. Express answers to the nearest ten-thousnadth.log 50
A. 3.912 B. 1.199 C. 4.412 D. 1.699
Use elimination to solve each system of equations, if possible. Identify the system as consistent or inconsistent. If the system is consistent, state whether the equations are dependent or independent. 0.5x - 0.1y = -2.7-0.3x - 0.5y = 0.5
A. (-5, 2); consistent and independent B. (-1.7, 6.5); consistent and independent C. inconsistent D. (-5.6, 4.3); consistent and independent
List the numbers from the set that are of the type indicated.B = {10, 
, -2, 0, 0.11}Rational numbers
A. 
, 0.11
B. 10, -2, 0, 0.11
C. 10, 0
D. 