1-The price of a scooter decreased from $250 to $140. By what percent is the price decreased? 2-A tennis racket, regularly priced $48.00, is on sale for $31.20. What is the percent discount for the tennis racket?

3-The tire store bought a tire for $50, and sold it for $80. What percentage was the mark up?

4-A family eats at a restaurant. The bill is $43. The family leaves a tip and spends $49.88. How much was the tip as a percentage of the bill? (Find the percent increase)

5-A salesclerk gets a 7% commission on the sale of each computer. What is her commission on the sale of a computer that sells for $495?

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.

At the county fair, the baxter family bought 6 hot dogs and 4 juice drinks for $12.90. the farley family bought 3 hot dogs and 4 juice drinks for $8.55. find the price of a hot dog and the price of a juice drink.

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)