An isotope has a half life of 94 years. How much of a 18 gram sample is left after 200 years?

One solution contains 2 parts salt to 8 parts water, and another contains 3 parts salt to 5 parts water. How much of each should be mixed together in order to obtain 280 quarts of a solution that is 3 parts salt to 7 parts water?

What is the conversion of miles per hour?

If a leak van empty 1/4th of a tank in 1 hour, how long will leak take to empty the full tank?

Show how to count from 170 to 410 using tens and hundreds

Two consecutive intergers have a sum of 79, find the intergers

Identify the population being studied. The heights of 5 out of the 38 green bean plants at Mr. Lonardo's greenhouse. a. The 5 green bean plants at Mr. Lonardo's greenhouse. b. All green bean plants in greenhouses. c. All green bean plants at Mr.

Round off 8,489,600 to the nearest thousand.

The speed of a passenger train is 18 mph faster than the speed of a freight train. The passenger train travels 270 miles in the same time it takes the freight train to travel 180 mph. What is the speed of the passenger train?

You served food to a group at a restaurant. The total cost of the food was $42.00. The sales tax is 8% of the cost of food. The group asked you to add 20% of the original cost of food for a tip. What was the total cost for the group?

Translate to an algebraic expression. 28 more than D d - 28 28 = d 28 - d d+28