A research firm took a sample of 31 small businesses and found that on average, a new change in the tax code saved these firms $7300 per year. The sample had a standard deviation of $2700 . Construct the 95%
confidence interval for the annual savings.

Liz is shipping a package to her friend.the maximum weight of a medium flat-rate box is 20 pounds,including the box which weighs 6 ounces.write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.

Solve the equation for x by graphing.2^x – 4 = -4^x + 4

Find the measure of angle abc. a. 124 b. 97 c. 56 d. 51