The number of people in a car that crosses a certain bridge is represented by the random variable x, which has a mean value μx = 2.7, and a variance σ2x = 1.2. the toll on the bridge is $3.00 per car plus $ .50 per person in the car. determine the mean and variance of the total amount of money that is collected from a car that crosses the bridge.

Find the value of x. round the length to the nearest tenth

Martha has a deck of cards. she has lost some of the cards, and now the deck only contains nine spades, eleven diamonds, eight clubs, and twelve hearts. martha predicts that whenever she draws a card from the deck without looking, she will draw a club one-fifth of the time. which activity would best allow martha to test her prediction? a. randomly draw a card from the box and see if it is a club. b. randomly draw a card. then, continue to draw another card until all eight clubs are drawn. c. randomly draw and replace a card 120 times. then, observe how close to 30 times a club is drawn. d. randomly draw and replace a card 100 times. then, observe how close to 20 times a club is drawn.

What is the domain of the of the exponential function shown below?