The graph below models the value of a $20,000 car t years after it was purchased which statement best describes why the value of the car is a function of years since it was purchased 1) each car value y is associated with exactly one time t 2) each t is associated with exactly one car value y 3) the rate at which the car decreases in value is not constant 4) there is no time t at which the value of the car is 0

Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?

Study results indicate that the mean length of time people spend on a bus in a city is between 21.2 min and 24.5 min what is the study margin of the error?

The 40th parallel of north latitude runs across the united states through philadelphia, indianapolis, and denver. at this latitude, earth’s radius is about 3030 miles. the earth rotates with an angular velocity of latex: \frac{\pi}{12} π 12 radians (or 15°) per hour toward the east. if a jet flies due west with the same angular velocity relative to the ground at the equinox, the sun as viewed from the jet will stop in the sky. how fast in miles per hour would the jet have to travel west at the 40th parallel for this to happen? show your work and explain your process.