Solve the problem.A package of weather instruments is propelled into the air to a certain altitude at which point a parachute opens and the package returns to the surface. The altitude y (in km) of the package as a function of the time t (in min) is given by 
. Find the vertical velocity of the package for 
min.
A. -1.4 km/min
B. -0.87 km/min
C. -1.1 km/min
D. -0.95 km/min
Answer: C
Mathematics
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A. 
B. 
C. 48y(y + 9)
D. 
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Find the length of the unknown side in the right triangle. Round to two decimal places, if necessary.
A. c = 2.31 B. c = 8 C. c = 2 D. c = 6.93
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Graph the function.f(x) = 2 log3x
A. 
B. 
C. 
D. 
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Simplify.64 + 19
A. 83 B. 84 C. 73 D. 82
Mathematics