Solve the problem.Murrel's formula for calculating the total amount of rest, in minutes, required after performing a particular type of work activity for 30 minutes is given by the formula R(w) = 
, where w is the work expended in kilocalories per min. A bicyclist expends 6 kcal/min as she cycles home from work. Find R'(w) for the cyclist; that is, find R'(6).
A. 2.96 min2/kcal
B. 3.7 min2/kcal
C. 4.44 min2/kcal
D. 13.33 min2/kcal
Answer: B
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Solve the given trigonometric equation analytically (using identities when necessary for exact values when possible) for values of x for 0 ? x < 2?.sin
= cos
A. 
, 
B. 0, ?
C. ?
D. 0, 
, ?, 
Solve the problem.Assume that the elevation E, in feet, of a sag in a proposed route is given by 
where x represents the horizontal distance in feet along the proposed route and 0 ? x ? 5000. For what x-values is the elevation 1150 feet? Round your answer to the nearest foot.
A. x = 566 ft or x = 7500 ft B. x = 556 ft or x = 7500 ft C. x = 556 ft or x = 7510 ft D. x = 566 ft or x = 7510 ft
Solve.A whispering gallery is a room in the shape of an elliptic reflector. If a source of sound is placed at one focal point of an elliptic reflector, the sound is reflected through the other focal point. If one person speaks at one focal point, then another person at the other can hear sounds as faint as a whisper. If the whispering gallery is based on the ellipse 
+ 
= 1, how many units from the center of the ellipse would the two people stand?
A. 5 units B. 4 units C. 3 units D. 16 units
Find the value of the expression.
A. 
B. 1
C. 6
D. 