Krypton-85 has a half life of 11 years. If a scientist has 500 grams of Krypton-85 in her lab and she decides not to use any for her experiments how much will remain after 50 years? (round to the nearest gram)

an amusement park charges $15.50 per day. Grandpa George paid $93 in admission fees for all his grandchildren.

A basket contains 6 peaches and 8 plums. what is the ratio of peaches to total peaches of fruit?

Mail Delivery Sam delivered mail to four houses numbered 115, 120, 110, and 105. He started at the house with the least number and continued to the house with the greatest number.

Delany can run 1 1/2 of a mile at a rate 16 minutes and 30 seconds. At this rate how many minutes will it take him to run one mile?

1.) Is 81 a multiple of 3? Explain how you know 2.) Is 46 a multiple of 4? Explain how you know 3.) Is 55 a multiple of 7? Explain how you know. 4.) Is 72 a multiple of 9? Explain how you know. 5.) Is 45 a multiple of 6? Explain how you know.

Write an equation for Greg ordered some books online for $6 each. He paid a total of $3 for shipping. The total cost of the purchase was $75.00. How many books did he buy?

Five miles Equals to how many feet

There is a book that is 8 inches long, 5 inches wide, and 2 inches thick what is the volume of the book?

A ball is thrown into the air with an upward velocity of 36 ft/s. Its height h in feet after t seconds is given by the function. In how many seconds does the ball reach its maximum height? Round to the nearest hundredth if necessary.

32 divided by 258.24