A certain radioactive substance has a half-life

of 2,000 years. How much of the radioactive

substance would remain after 8,000 years if

an initial sample had 40.0 grams of the

substance?

Which shows the expression below simplified? 0.00048 : (6 * 10-4) A 8 * 10-2 B 8 * 10-1 C 8 * 101 D 8 * 100

What do you suppose a decimal value for a day in the month means

Simplify:4x+6 (3x-12 A 10x - 12 B18x-12 C22x-12 D30*30X-12

Solve 12x-4y=20 for y

Which operation should you do first 8+3 (7^2*4) - 5:2

Carol has two cats rover and Bobo. Rover eat three fourths of a can of cat food each day and bobo eat a half of a can of cat food each day. Cat food cost five dollars for three cans. It's is only sold in three can packs.

Write a system of equations with (1,-2) as its solution

which has the best unit rate? 16 oz for $4.25 or 20 oz for $ 4.55 I chose 16 oz but I need to make sure it's right

Is 3√ a irrational number

Does anyone know what 2 to the 3rd power means?