Write the number in expanded form.50,800
A. 5 thousands + 8 hundreds
B. 580 ten thousands
C. 5 ten thousands + 8 thousands
D. 5 ten thousands + 8 hundreds
Answer: D
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Solve the problem.The position (in centimeters) of an object oscillating up and down at the end of a spring is given by 
at time t (in seconds). The value of A is the amplitude of the motion, k is a measure of the stiffness of the spring, and m is the mass of the object. Find the object's acceleration at time t.
A. a = - A sin 
cm/sec2
B. a = - A
sin 
cm/sec2
C. a = - 
sin 
cm/sec2
D. a = 
cos 
cm/sec2
Solve the problem.In the figure shown below, the image of point P under a 90° clockwise rotation having rotocenter O is
A. A. B. B. C. C. D. D. E. none of these
Give the amplitude or period as requested.Amplitude of y = -5 sin 2x
A. 
B. 
C. 5
D. 
Two forces act at a point in the plane. The angle between the two forces is given. Find the magnitude of the resultant force.forces of 46.4 and 60.2 lb, forming an angle of 126.7°(round to the nearest pound)
A. 49 lb B. 95 lb C. 9116 lb D. 101 lb