Sodium-24 has a half life of 15 hours. How many grams of 900g sample will remain after 90 hours?

The measure of an acute angle in a right triangle is one-fourth the measure of the other acute angle. Write a system of linear equations that represents this situation.

Why is pi day celebrated on march 14th

Determine if the statement is always, sometimes or never true. The measure of an exterior angle at the vertex of a polygon equals the measure of the adjacent interior angle. always sometimes never

What is the quotient of 3/7

Write three ratios that are equilvalent to the one given:18 right-handed students for every 4 left handed students

There are three routes from a person's home to her place of work. There are four parking lots where she works, three entrances into her building, two elevators to her floor, and one route from each elevator to her office door.

A scientist measures a substance to be 0.6 grams. Calculate the percent of error in the measurement. Show all work for full credit

Factor the trinomial completely 2x^5+16x^4+8x^2 2x 5 + 16x 4 + 8x 2

Solve for x. x/4 + 6 = 10

How can you use mental math to find the percent of a number?