Graph the pair of parametric equations with the aid of a graphing calculator.x = cos 4t, y = sin 3t, 0 ? t ? 2?
A. 
B. 
C. 
D. 
Answer: B
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Solve the problem.A water tank can be filled in 6 minutes and emptied in 7 minutes. If the drain is accidentally left open when the tank is being filled, how long does it take to fill the tank?
A. 42 min
B. 
min
C. 3
min
D. 
min
Simplify.-
+ 40 ÷ (6 - (-4)) - 32
A. 4 B. -86 C. -14 D. 31
Find the slope of the line. If the slope is undefined, state this.
A. 1 B. 2 C. -2 D. -1
Solve the problem.The following table shows the safe exposure time for the average person.UV IndexSafe Exposure Time (in min.)246810230120806540?(i) Determine whether the data indicate direct variation or inverse variation.(ii) Find an equation of variation that approximates the data. Use the data point (6, 80).(iii) Use the equation to predict the safe exposure time for the average person when the UV rating is 3.
A. (i) Direct;
(ii) y = 720x;
(iii) 1440 minutes
B. (i) Inverse;
(ii) y = 
;
(iii) 160 minutes
C. (i) Inverse;
(ii) y = 
;
(iii) 80 minutes
D. (i) Direct;
(ii) y = 240x;
(iii) 720 minutes