In 3 years, 25% of a radioactive element decays. What's it's half-life?

Julia studies math for 3 and one third hours during the 4 days before her last test. What was the average amount of time she studied each day?

Mariana knit a total of 20 centimeters of scarf over 2 nights. After 5 nights of knitting, how many centimeters of scarf will Mariana have knit in total? Solve using unit rates.

Anton unpacks 4 dozen glasses from a box. he finds 5/12 of the glasses are broken. how many glasses are broken?

Donna made a row of tiles 96 inches long with 12 tiles. Her friend Rani wanted to make a row of tiles 288 inches long. How many tiles would it take her to do this?

A cyclist is riding 18 miles per hour, how many feet per second is the cyclist riding?

In a random sample of 60 computers, the mean repair cost was $150. Assume the population standard deviation is $36. Construct a 90% confidence interval for the population mean.

Factor x^2 + 5x + 10 completley

How to factor x^2+2xy+2x+y^2+2y-8

Michelle's game piece was on 58. She uses these cards to capture a chip: + 2 + 30 + 2 where did she land? Write an equation to show her moves.

You are standing in one big palace where a king and his 5 queens stay. Each queen has 5 rooms. In each room there are 5 big cats. Each big cat has 5 little cats. Each cat has 4 legs. How many legs are there in the palace? Take ur time ...