Cobalt-60 has a half-life of about 5 years. How many grams of 300 g sample well remain after 20 years?

If the selling price is $18 and the markup is 33% what is the dollar markup

A basket contains 13 pieces of fruit : 5 apples, 5 oranges and 3 bananas. Jonas takes a piece of fruit at random from the basket, and then Beth takes a piece at random.

Write each rate as a unit rate. $2 for 5 cans of soup.

Tickets for a local dog show cost $9.75 each. What is the total cost C, in dollars, for t tickets? Write an equation to represent the situation.

If Colby bangs Danielle for 4 hours, and if they each get half of the money when they bang together, will Colby make more money jacking alone or by doggying with Danielle?

robert wants to put lights around the edge of his deck. The deck is 43 feet long and 26 feet wide. How many yards of lights does he need?

If a computer costs $600.00 and the sales tax rate is 7.5 percent, what is the total cost of the computer?

What is 2/3 cup chopped nuts multiplied by 6?

Who is taller 180 cm or 5ft 8in.

Samantha's notebook has 14 pages more than three times as much as Lisa's notebook. If Samantha's notebook has 260 pages, how many pages are there in Lisa's notebook?