Solve the problem. Round to the nearest tenth, if necessary.If an object is thrown upward with an initial velocity of 
, its height after t sec is given by 
. Find the maximum height attained by the object. (The object will attain maximum height exactly at the halfway point in terms of the time t, where t = 0 is at the beginning of the object's flight, and the final time is when the object hits the ground.)
A. 100 ft
B. 64 ft
C. 80 ft
D. 84 ft
Answer: A
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Solve the problem.There are 2.2 milligrams of iron in a 3.5 ounce serving of lamb. How much iron is in 4 ounces of lamb? Round to the nearest tenth, if necessary.
A. 1.9 mg B. 2.5 mg C. 2.9 mg D. 3.5 mg
Expand, where i2 = -1.
4
A. 1 B. -1 C. 1 - i D. 1 + i
Solve the problem.The top and base of a window are respectively 14 ft and 3 ft above the level of an observer's eyes. At what distance from the wall must the observer stand in order to make the angle subtended by the window equal to the angle of elevation of its base? Round to the nearest whole unit.
A. 10 ft B. 8 ft C. 4 ft D. 6 ft
List the x-values in the graph at which the function is not differentiable.
A. Function is differentiable at all points. B. x = -1, x = 1 C. x = 0 D. x = -1, x = 0, x = 1