A retailer sold anappliance for $80. If the retailer'sgross profit on the appliance was 25 percent of the retailer's cost for theappliance, how many dollars was the retailer's gross profit?

Each year Mark works40 hours per week for 50 weeks. Last year Mark was paid a total of$20,000. If this year his hourly payrate is raised by $0.50, what is the total amount that Mark will be paid thisyear?

A certain kennel will house 24 dogs for 7 days. Each dog requires 10 ounces of dog food per day. If the kennel purchases dog food in cases of 30 cans each and if each can holds 8 ounces of dog food, how many cases will the kennel need to feed all of the dogs for 7 days?

A certain company charges $6 per package to ship packages weighing less than 2 pounds each. For a package weighing 2 pounds or more, the company charges an initial fee of $6 plus $2 per pound. If the company charged $38 to ship a certain package, which of the following was the weight of the package, in pounds?

Three boxes ofsupplies have an average (arithmetic mean) weight of 7 kilograms and a medianweight of 9 kilograms. What is themaximum possible weight, in kilograms, of the lightest box?

List K consists of 12consecutive integers. If -4 is the least integer in list K, what is the range of the positive integers in list K ?

If two sides of a triangle have lengths 2 and 5, which of the following could be the perimeter of the triangle ?

I. 9

II. 15

III. 19

Adam and Beth eachdrove from Smallville to CrownCityby different routes. Adam drove an anaverage speed of 40 miles per hour and completed the trip in 30 minutes. Beth's route was 5 miles longer, and it tookher 20 minutes more than Adam to complete the trip. How many miles per hour was Beth's averagespeed on this trip?

When a certain tree was first planted, it was 4 feet tall, and the height of the tree increased by a constant amount each year for the next 6 years. At the end of the 6th year, the tree was ~$\frac{1}{5}$~ taller than it was at the end of the 4th year. By how many feet did the height of the tree increase each year?

If the operation ~$\circledast$~ is defined for all integers a and b by a~$\circledast$~b =a + b - ab which of the following statements must be true for all integers a, b, and c ?

I. ~$a\circledast b=b\circledast a$~

II. ~$a\circledast 0=a$~

III. ~$\left ( a\circledast b \right )\circledast c=a\circledast \left ( b\circledast c \right )$~