In the June 1986 issue of Consumer Reports, some data on the calorie content of beef hot dogs is given. Here are the numbers of calories in 20 different hot dog brands: 186; 181; 176; 149; 184; 190; 158; 139; 175; 148; 152; 111; 141; 153; 190; 157; 131; 149; 135; 132: Assume that these numbers are the observed values from a random sample of twenty independent normal random variables with mean and variance 2, both unknown. Find a 90% confidence interval for the mean number of calories .

The blue whale is the largest animal living on the earth. the average blue whale measures 100 feet long (30 meters) and weighs 300,000 pounds (136,000 kilograms). a whale’s head is 1⁄3 of the length of its body. a new baby whale is 1⁄4 the length of a grown whale. the average man is 1⁄17 the length of a blue whale, and 1⁄1,818 its weight. a human baby measures 1⁄4 of the length of an adult. calculate the following information: how long is a whale’s head? how long is a new baby whale? how tall is the average man? how much does the average man weigh? how tall is the average human baby?

Solve the system of equations. y= 2x y= x^2 - 15

Which statements are true about the linear equation y> 3/4x-2? check all that apply