Find the exact value of the expression.sin 10° cos 50° + cos 10° sin 50°
A. 
B. 
C. 
D. 
Answer: C
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Solve the problem.An object at the end of a spring is immersed in liquid. Its velocity (in cm/s) is then described by the equation 
where t is the time (in s). Find the displacement s as a function of t if s = -4 cm for t = 0.
A. s = -e-2t - 
e-8t - 
B. s = e-2t + 
e-8t - 
C. s = -e-2t + 
e-8t + 
D. s = -e-2t - 
e-8t + 
Complete the equation so the result is an identity. 1 + 
= csc2x
A. cos2x B. sin2x C. cot2x D. sec2x
Factor completely, or state that the polynomial is prime.2x2 - 10xy + 12y2
A. 2(x - 2y)(x - 3y) B. 2(x + 2y)(x + 3y) C. prime D. 2(x - 2)(x - 3)
Use the formula for the area or circumference of a circle to solve the problem. Where applicable, express answers in terms of ?.The circumference of a circle is 32? meters. Find the circle's diameter.
A. 16 m B. 16? m C. 32 m D. ? m