Help ! preston can paint 375 square feet in 3 hours . at the same rate how long would it take him to paint 812.5 square feet ?

a ; 0.15 hours
b ; 1.4 hours
c ; 7.5 hours
d ; 6.5 hours

Acd that is originally priced at $15.85 red-tagged for the sale. what is the sale price of the cd

Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$

Your friend uses c=50p to find the total cost, c, for the people, p, entering a local amusement park is the cost of admission proportional to the amount of people entering the amusement park? explain.