A radioactive substance decays exponentially. A scientist begins with 100 milligrams of a radioactive substance. After 27 hours, 50 mg of the substance remains. How many milligrams will remain after 36 hours?

How many inches are in 16 meters?

Think about what you have learned about parallel and perpendicular lines. In what profession might a person rely upon this information? Describe how that person would apply these concepts.

You go to a restaurant and your bill is $8.00. If you leave a 15% tip, How much did u spend all together at the restaurant?

The janitor at a school discovered a leak in a pipe. The janitor found out that it was leaking at a rate of 14 oz per hour. How fast was the pipe leaking in gallons per day?

Sally was given the equation 2x+3=11 what did she do wrong, what is the true value of x

Alley has 10 kittens, and 4 puppies for sale. 4 of the kittens are girls and 6 are boys. 3 of the puppies are boys, and 1 is a girl.

3b + 2 - b = - 18 simplify

The line 6x - 3y = 24 represents Shari's distance from home, y in blocks, on her run across town over time, x, in minutes. What is the x-intercept of this line? What does the x-intercept represent?

An amusement park charges an admission fee of 50 dollars for each person. let c be the cost (in dollars) of admission for p people. write an equation relating c to p. then use this equation to find the cost of admission for 17 people.

If the length of the major axis of an ellipse is 28 units and the foci are located 3.5 units away from the center, what is the eccentricity of the ellipse?