Solve the problem.Researchers have discovered that by controlling both the temperature and the relative humidity in a building, the growth of a certain fungus can be limited. The relationship between temperature and relative humidity, which limits growth, can be described byR(T) = -0.00005T3 + 0.326T2 - 1.5572T + 97.086,0 ? T ? 46,where R(T) is the relative humidity (in %) and T is the temperature (in °C). Find the temperature at which the relative humidity is minimized.
A. -0.61°C
B. 2.39°C
C. 4344.28°C
D. 3.39°C
Answer: B
Mathematics
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The position vector of a particle is r(t). Find the requested vector.The acceleration at t = 
for r(t) = (10t - 5t3)i + 2tan(3t)j + e3tk
A. a
= - 
?i - 72j + 9e1/4?k
B. a
= - 
?i - 72j + 9k
C. a
= - 
?i + 72j + 9e1/4?k
D. a
= 
?i + 72j + 9e1/4?k
Mathematics
Solve the equation.d - 4 = -17
A. -21 B. -13 C. 21 D. 13
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Find the slope and y-intercept of the line.2x - 7y = 3
A. slope = 2; y-intercept = 3
B. slope = 
; y-intercept = 
C. slope = 
; y-intercept = 
D. slope = 
; y-intercept = - 
Mathematics
Match the graph to its equation.
A. 
+ 
= 1
B. 
+ 
= 1
C. - 
+ 
= 1
D. 
- 
= 1
Mathematics