List the independent and dependent variable in the given relationship. josie receives $7.50 for each hour of babysitting. a. independent variable is the money earned. dependent variable is the number of hours babysitting. b. independent variable is the number of hours babysitting. dependent variable is the money earned. c. independent variable is josie. dependent variable is the money earned. d. independent variable is josie. dependent variable is the number of hours babysitting.

What is the slope of the line shown below?

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)

Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?