Solve the problem.A rocket is shot straight up in the air from the ground at a rate of 53 feet per second. The rocket is tracked by a range finder that is 424 feet from the launch pad. Let d represent the distance from the rocket to the range finder and t represent the time, in seconds, since "blastoff". Express d as a function of t.
A. d(t) = 
B. d(t) = 4242 + (53t)2
C. d(t) = 
D. d(t) = 424 + 53t2
Answer: C
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Find the partial derivative of the dependent variable or function with respect to each of the independent variables.z = 
A. 
= - 
; 
= - 
B. 
= - 
; 
= - 
C. 
= - 
; 
= - 
D. 
= 
; 
= 
Decide whether the equation is or is not an identity.sin (? + ?) sin (? - ?) = sin2? - sin2?
A. Not an identity B. Identity
Find or investigate the function as requested.If water is added to an empty tank such that the water level rises by 2 cm every 25 minutes, then what is the level of the water L(t) in the tank after t minutes?
A. L(t) = 50t
B. L(t) = 2t
C. L(t) = 
t
D. L(t) = 
t
Determine the most appropriate metric unit to go in the blank. Choose from km, m, cm, mm, L, mL, kg, g, and mg.The portion of fish weighs 113 
.
A. mm B. mL C. mg D. kg E. g