Graph the ellipse and locate the foci.
+ 
= 1
A. foci at (4, 0) and (-4, 0)
B. foci at (
, 0) and (-
, 0)
C. foci at (0, 
) and (0, -
)
D. foci at (5, 0) and (-5, 0)
Answer: B
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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.For what angle T is cos T ? 0.766? (Assume 0° ? T ? 90°.)
A. 40° B. 36.832° C. 50° D. 0.766°
Evaluate the given logarithm.log832
A. 
B. 
C. 
D. 
Solve.David recently switched to a long distance phone company which charges a monthly fee of $5.45 plus $0.07 per minute. A linear function that expresses the monthly bill B as a function of minutes used m is 
Graph the linear function. Use a domain of 0 ? m ? 300.
A. 
B. 
C. 
D. 
Solve the problem.You throw a ball straight up from a rooftop. The ball misses the rooftop on its way down and eventually strikes the ground. A mathematical model can be used to describe the relationship for the ball's height above the ground, y, after x seconds. Consider the following data: 
Find the quadratic function y = ax2 +bx + c whose graph passes through the given points.
A. y = -12x2 + 90x + 16 B. y = -16x2 + 90x + 20 C. y = -16x2 + 80x + 30 D. y = -10x2 + 100x + 4