Use graphical methods to find any turning points of the graph of the function.f(x) = 
A. (-1, 0.5)
B. (1, 0.5)
C. (-1, 0.5), (0, 1), (1, 0.5)
D. (0, 1)
Answer: D
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If r(t) is the position vector of a particle in the plane at time t, find the indicated vector.Find the acceleration vector.r(t) = (3 cos t)i + (7 sin t)j
A. a = (3 cos t)i + (7 sin t)j B. a = (-3 sin t)i + (-7 cos t)j C. a = (3 sin t)i + (7 cos t)j D. a = (-3 cos t)i + (-7 sin t)j
Solve the problem.Police use a formula s = S 
, where S is the test-car speed and L is the test-skid length, to find the actual speed s in an accident which left a skid mark of l. Find the actual speed (nearest whole mph) when 
A. 95 mph B. 55 mph C. 37 mph D. 68 mph
Complete.20 pt = cups
A. 160 B. 10 C. 40 D. 80
Find the perimeter of the shape made up of rectangles and squares.
A. 47 km B. 88 km C. not enough information given D. 94 km