Find the second derivative.y = 4x2 + 7x + 4x-3
A. 8 + 48x-1
B. 8 + 48x-5
C. 8x + 7 - 12x-4
D. 8 - 48x-5
Answer: B
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Use the vectors in the figure below to graph the following vector. 
u + z 
A. 
B. 
C. 
D. 
Determine whether the system of equations is consistent or inconsistent. If the system is consistent, determine whether the equations are dependent or independent.
A. Dependent B. Inconsistent C. Independent
Solve the problem.A square wave is built up from sinusoidal curves of varying periods and amplitudes. Graph the following function, which can be used to approximate the square wave.f(x) = src="https://sciemce.com/media/4/ppg__ggv0526191711__f1q106g5.jpg" alt="" style="vertical-align: -17.0px;" />0 ? x ? 4 
0 ? x ? 4 
A better approximation to the square wave is given by f(x) = 
Graph this function and compare the result to the previous graph. Adding another term will improve the approximation even more. Write this new function with four terms.
What will be an ideal response?
Solve the problem.The percent of concentration of a drug in the bloodstream x hours after the drug is administered is given by K(t) = 
. On what time interval is the concentration of the drug increasing?
A. (0, 4) B. (1, 4) C. (0, 5) D. (-4, 4)