Use the identity cos2 s + sin2 s = 1 to find the value of x or y, as appropriate.
, y < 0
A. - 
B. - 
C. - 
D. - 
Answer: C
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Graph the pair of parametric equations with the aid of a graphing calculator.x = cos 5t, y = sin 2t, 0 ? t ? 2?
A. 
B. 
C. 
D. 
Add or subtract as indicated. Simplify, if necessary.- 
- 
A. 
B. - 
C. 
D. - 
Solve.4x + 5 = -11
A. -4
B. -20
C. - 
D. - 
Solve the problem.Newton's Law of Cooling states that if a body with temperature T1 is placed in surroundings with temperature T0 different from T1, then the body will either cool or warm to temperature T(t) after time t, in minutes, where 
A dish of lasagna baked at 375°F is taken out of the oven into a kitchen that is 74°F. After 8 minutes, the temperature of the lasagna is 310.8°F. What will its temperature be 15 minutes after it was taken out of the oven? Round your answer to the nearest degree.
A. 274°F B. 260°F C. 252°F D. 266°F