Solve the problem.The number of new mini-vans sold by a particular salesperson during the month of March is exponentially distributed with a mean of 6. What is the probability that the salesperson will sell between 4 and 6 mini-vans in March?
A. 0.128
B. 0.110
C. 0.109
D. 0.146
Answer: D
Mathematics
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Find the focus and directrix of the parabola.- 
x2 = y
A. (0, -2); y = -2 B. (-4, 0); x = 2 C. (0, 2); y = -2 D. (0, -2); y = 2
Mathematics
Express the integrand as a sum of partial fractions and evaluate the integral.
A. 
tan-1 
+ ln 
- 
+ C
B. tan-1 
- 
- 
+ C
C. 
tan-1 
+ 
- 
+ C
D. 
tan-1 
- 
+ 
+ C
Mathematics
Solve the equation.5[-5x - 7 - 6(x + 1)] = 2x + 7
A. 
B. 
C. 
D. 
Mathematics
Simplify the exponential expression.
A. x4
B. x2
C. x8
D. 
Mathematics