given the directed line sgement qs find the coordinates of r such that the ratio of qr to rs is 3:5 plot pount r

What percent of $1.00 are a nickel and a dime?

X=4 / y=100 if x=10 then what is y=?

How many revolutions will a car wheel of diameter 28 in. make over a period of half an hour if the car is traveling at 60 mi/hr? the final answer is supposedly 21,609 but i have no idea how to get that, show work : )