Evaluate the expression.
A. 5040
B. 0
C. 7
D. 1
Answer: C
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Solve the problem. Assume the x-axis is horizontal, the positive y-axis is vertical (opposite g), the ground is horizontal, and only the gravitational force acts on the objects. A projectile is fired with an initial speed of 569 m/sec at an angle of 45°. What is the greatest height reached by the projectile? Round your answer to the nearest tenth.
A. 8,259.2 m B. 82.1 m C. 33,036.8 m D. 80,940.3 m
Solve the problem.When a person bends at the waist with a straight back, the force, F, exerted by the person's lower back muscles can be estimated with the formula 
where w is the person's weight, and ? is the angle made by the person's torso relative to the horizontal. Suppose that a 
person bends at an angle of 35°. Determine the force exerted by the person's back muscles, and estimate the angle that requires the back muscles to exert a force of 393 pounds.
A. 568 pounds; 35° B. 568 pounds; 55.5° C. 398 pounds; 48.3° D. 29 pounds; 55.5°
Solve the problem.For a certain drug, the rate of reaction in appropriate units is given by 
where t is measured in hours after the drug is administered. Find the total reaction to the drug from 
to 
A. 5.17 B. 11.35 C. 9.96 D. 4.98
Find the indicated matrix.Let A = 
, B = 
and C = 
. Find A + B - C.
A. 
B. 
C. 
D. 