Simplify the rational expression. $\frac{6-x}{10x-60}$

A) $-\frac{1}{4},x\ne 6$
B) $-\frac{1}{10},x\ne 6$
C) $6,x\ne 6$
D) $10,x\ne 6$
E) $\frac{1}{6},x\ne 6$

Six hundred consumers belonging to the 25-34 age group were randomly selected in a city and were asked whether they would like to purchase a domestic or a foreign automobile.Their responses are given below. ​
Develop a 95% confidence interval for the proportion of all such consumers who prefer to purchase domestic automobiles.

Whenever a statistical population can be described, at least roughly, by the perfectly symmetrical, bell-shaped normal curve, we can estimate the percentages of all population values that lie within specified numbers of standard deviations from the mean with the help of:

A) Tchebysheff's Theorem
B) the empirical rule
C) the interquartile range
D) box plot
E) none of these

The variance is more difficult to interpret than the standard deviation.

The amount of time that a microcomputer is used per week is an example of a(n)____________________ random variable.

What number is 150% of 38?

A) 1.5
B) 0.38
C) 67
D) 5.7
E) 57

In general,the binomial probability P(X ≤ x)is approximated by the area under the normal curve to the left of x + .5.

An $8,000 demand loan at a fixed simple interest rate of 10.5% was advanced on May 10. A payment of $2,000 was made on July 15 and a final payment was made on Sept. 5. What was the size of the final payment?

A) $6,241.64
B) $6,243.92
C) $6,363.61
D) $6,151.89
E) $8,152.90

Refer to the Withholding Allowance information. Clara Webb claims herself and four dependents. Compute the total amount of Webb's allowance.​