Suppose a brand of lightbulbs is normally distributed with a mean life of 1900 hours and a standard deviation of 50 hours. Find the probability that a lightbulb will last between 1825 hours and 1980 hours

Which of the following angles is in the solution set of sec^2θ - 3secθ - 2 = 0 for 0° ≤ θ < 360°. A. 0° B. 56° C. 60° D. 74°

Conan O'Brien hosts the Conan show and Andy Richter, his sidekick, writes for it. Conan needs 4 hours to host a good show. It takes Andy 10 hours to do the same. Conan writes one usable joke in an hour, but Andy needs 2 hours to do the same.

Identify the outlier in the data. Then find the mean when the outlier is included and when it is not included. 68, 63, 67, 66, 65, 87, 69, 61, 86, 82, 28 A. outlier is 28; mean with outlier = 67; mean without outlier = 67.5 B.

Find the inner product for (7,2) * (0,-2) and state wheter the vectors are perpendicular

The sign of the product of - 350 and 89 is

Kayla used 4/14 of her allowance to buy yogurt and 8/14 of her allowance to go skating. What fraction of her allowance does she have left? Explain your thinking.

Suppose, Gallup asks 2100 Japanese people whether Japan will be able to completely recover from the devastation of the recent earthquake/Tsunami and and that 67% believed in the affirmative.

Julie made $22, $55, $38, and $25 babysitting. How much did she make babysitting.

The value of 103 is between which two intergers?

Identify which of these types of sampling is used: random, systematic, convenience, stratified, or cluster. To determine her mood , Britney divides up her day into three parts: morning, afternoon, and evening.