Solve the problem.The volume of a right cylindrical cone of height 6 cm and radius r cm is 
cubic centimeters 
Find the instantaneous rate of change of the volume with respect to the radius r when r = 4 cm. Express the answer in terms of ?.
A. 4? cm3/cm
B. 32? cm3/cm
C. 16 cm3/cm
D. 16? cm3/cm
Answer: D
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Perform the indicated operations.-16
+ 2
A. 13
B. 19
C. -14
D. -18
Place your graphing calculator in parametric and degree modes. Set the window for Tmin=0, Tmax=360, Tstep=1, Xmin= -1.8, Xmax=1.8, Xscl=1, Ymin= -1.2, Ymax=1.2, Yscl=1. Set the functions to X1T=cos T, Y1T=sin T. Graph the circle of radius 1 on the screen. Use the trace feature to move a short distance around the circle.As the cosine increases for 0° ? T ? 90°, does the sine increase or decrease?
A. Cannot determine B. Increases C. Decreases
Factor.8z2 + 6zy - 9y2
A. (4z - 3y)(2z + 3y) B. (8z - 3y)(z + 3y) C. (4z + 3y)(2z - 3y) D. (8z + y)(z - 9y)
Solve the problem.At the end of T years, the amount of money A in a savings account earning simple interest from an initial investment of P dollars at rate R is given by the formula 
Write an equivalent equation by factoring the expression 
A. A = P(1 + RT) B. A = RT(P + 1) C. A = P(P + RT) D. A = P(1 + PRT)