Suppose 500 coins are tossed. Using the normal curve approximation to the binomial distribution, find the probability of the indicated results.Exactly 250 heads
A. .040
B. .016
C. .031
D. .032
Answer: D
Mathematics
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Solve the differential equation.cos x 
+ y sin x = sin x cos x
A. y = sin x ln |sec x| + C sin x B. y = cos x ln |sec x| + C cos x C. y = cos x ln |sec x + tan x| + C cos x D. y = cot x + C cos x
Mathematics
Sketch the graph of the function. Describe how the graph can be obtained from the graph of a basic exponential function.f(x) = 3(x - 1)
A. Shift y = 3x left 1 unit(s)
B. Shift y = 3x up 1 unit(s)
C. Shift y = 3x down 1 unit(s)
D. Shift y = 3x right 1 unit(s)
Mathematics
Use the formula d = rt to find the value of the missing variable.d = 264 miles, r = 66 mph
A. t = 5 hr
B. t = 
hr
C. t = 3 hr
D. t = 4 hr
Mathematics
Evaluate the function.Find f(-1).
A. 4 B. -4 C. 2 D. -1
Mathematics