A random sample of 105 light bulbs had a mean life of 441 hours with a standard deviation of 40 hours. Construct a 90% confidence interval for the mean life, mu, of all light bulbs of this type.

Choose the correct description of the graph of the compound inequality x - 2 > - 4 and 3x less than or equal to 15.

Suppose you are given data from a survey showing the IQ of each person interviewed and the IQ of his or her mother. That is all the information that you have.

A business buys invoice forms at a cost of $4.45 a box for the first 20 boxes, $4.00 a box for the next 25 boxes, and $3.75 a box for any additional boxes. How many boxes of invoice forms can be bought for $234.00?

In how many years, will an amount double itself, if the simple interest is calculated at the rate of 10% p. a.?

Solve the problem. The organizer of a television show must select 5 people to participate in the show. The participants will be selected from a list of 30 people who have written in to the show.

For the equation 3x = 12 is the answer 36

13/25 convert in to percent

The state fair is a popular field trip destination. This year the senior class at High School A and the senior class at High School B both planned trips there. The senior class at High School A rented and filled 8 vans and 8 buses with 240 students.

What is the answer to this equation 5X + 4 = 49

The table shows the amount of paint left in each jar which jar contains the greatest amount of paint the least