Every week for 20 weeks, kathy earned $15 for mowing lawns and $35 for delivering newspapers. at the end of 20 weeks, she stopped mowing lawns and delivering newspapers and spent $300. she didn't earn or spend any money besides what is described here. write a numerical expression with parentheses for the amount of money kathy has left. do not simplify your expression.

Because of your favorite lemonade it is $3.84 for 3 gallons. write this as an unit rate

You drop a rubber ball off the roof of a 50 meter high building onto a paved parking lot. it bounces back up with every bounce, but not quite all the way back up to you. after the first bounce it bounces back only 80 percent of the distance it was dropped from. the pattern continues, meaning after every bounce it comes up to just 80 percent of the previous maximum height. so if before the first bounce the height is 50 meters, what height does the ball reach after the fifth bounce? round your answer to one decimal place and chose the correct response from the choices below:

The chs baseball team was on the field and the batter popped the ball up. the equation b(t)=80t-16•16+3.5 represents the height of the ball above the ground in feet as a function of time in seconds. how long will the catcher have to get in position to catch the ball before it hits the ground? round to the nearest second