Find the standard deviation of the probability density function to the nearest hundredth.f(x) = 
; [3, 6]
A. 0.86
B. 0.87
C. 0.94
D. 0.61
Answer: B
Mathematics
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Assuming that the equations define x and y implicitly as differentiable functions 
find the slope of the curve 
at the given value of t.x cos t + x = 2t, y = t sin t + t, t = 
A. 2
B. 
C. 2 + ?
D. 
Mathematics
Solve.log2(8)-1 = x + 7
A. -10 B. 4 C. 10 D. -9
Mathematics
The line graph shows the recorded hourly temperatures in degrees Fahrenheit at an airport.
Estimate when the temperature was -5°F.
A. 10:30 a.m. B. 10:15 a.m. C. 10:45 a.m. D. 10 a.m.
Mathematics
Solve the problem.A circular pond is being installed in the corner of a yard, as shown. The installer needs to know the value of x in feet. Find x to the nearest tenth of a foot. 
?a = 43 ft
A. 2.7 ft B. 3.4 ft C. 3 ft D. 3.6 ft
Mathematics