The half-life of rubidium-89 is 15 minutes. If the initial mass of the isotope is 250 grams, how many grams will be left after 100 minutes?

Write a question that could be answered by solving the equation 10-0.035d=4

Rita earns $16.00 per hour. If she gets a 3% raise, what will be her new hourly wage?

Why property does the number sentence show 8+0=8

The total weight for a family of 4 hippos is 14,007 pounds. The mother hippo weighs 5,930 pounds. Her first baby weighs 1,455 pounds, and the second baby weighs 418 pounds. How much does the father hippo weigh?

A person who needs a car for at least a year while traveling for work would most likely choose which of the following? A. A carpool B. A car rental C. A car lease D. A car share

The sum of three consecutive integers is - 255. what are they?

How many two third ounce can be made with 8ounces

Written as a simplified polynomial in standard form, what is the result when (3x + 1) 2 is subtracted from 8?

Every two days he's trying to spend 1.75 hours observing dolphins and 2.5 hours observing sea lines at this rate how many total hours will the scientist spend a observing dolphins and sea lions in 10 days

An expression is given: x (-1.8-6y) Use the distributive property to expand the expression.