About 10% of people in the United States do not wear a seat belt. Suppose we take a random sample of 180 U. S. residents and let X =The number of people who do not wear their seat belts. (a) Calculate the mean and standard deviation of the sampling distribution of X. *Type only the number for your answer, with 2 decimal places.

Cassie is traveling 675 miles today to visit her brother and his family. so far, she has stopped for gas three times. at the first stop, she put in 7.1 gallons of gas and paid $23.79. at her second stop, she put in 5.8 gallons of gas and paid $19.08. and, at the third stop, 6.6 gallons and paid $20.39. at which stop did casey pay the most for gas?

The measure of an angle is 117°. what is the measure of a supplementary angle?

Stefanie is painting her bedroom. she can paint 2 1/3 square feet in 4/5 of an hour. how many square feet can she paint in one hour?