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

A circular Native American dwelling has a diameter of 24 feet. How much area is inside the home? Use 3.14 for pi

In a psychological experiment, a person is able to memorize M words in t minutes, where M = - 0.001t^3 + 0.1t^2. Find the average rate of change in the number of words a person can memorize between 10 minutes and 20 minutes

How can you tell whether a square root of a whole number is rational or irrational?

A plot of rectangular land is divided into 3 sections, P. Q and R to plant three types of vegetables. The perimeter of the land is 170 m and the length of the land is 15 m more than its width.

What is the solution to the inequality -0.4x - 1.2>0.8

How many ways can 5 people be seated in a line of chairs? A) 25 B) 120 C) 3125 D) 30240

How do u solve (x^10/y^8) ^1/2

For each of the finite geometric series given below, indicate the number of terms in the sum and find the sum. For the value of the sum, enter an expression that gives the exact value, rather than entering an approximation. A. 5+5 (0.15) + 5 (0.

25/75 in lowest terms

Declan has n baseball cards sam has 4 times as many baseball cards as declan amaya has 7 fewer baseball cards than sam which expression represents the number of baseball cards that amaya has