The average mass of a grain of sand on a beach is about 0.000015. What is 0.000015 in scientific notation?

Solve the equation by using the Properties of Equality 7/3y + 2 = 1/2

A high school purchases a printing machine that can put lettering on clothing for $6000. The school plans to print T-shirts with the school logo and sell them. Each T-shirt costs the school $4 and will sell for $12.

Huilan's age is two times thomas's age. the sum of their ages is 84. what is thomas's age?

manager needs to buy chairs for his office the price for 1 chair is 79.99 dollars. If the manager buys 2 or more chairs then he get's a 40% discount on each chair. Approximately how much will the manager save on each chair if he buys 2?

What what kind of triangles are the coolest

Name a fraction equivalent to 2/3

The teacher has 15 gold prize ribbons, 22 blue ribbons, and 5e red ribbons. There are 12 boys and 18 girls in the class.

3 (6x^2-5x+7) - 2 (-4x^2+8-10)

A model ship is built to a scale of 1 centimeter: 5 meters

Simply: x^3 y^3 / x^3 y^2 (the arrows mean to the power of the number)