Serial numbers for a product are to be made using 3 letters followed by 4 digits. the letters are to be taken from the first 8 letters of the alphabet with no repeats. the digits are taken from the 10 digits with no repeats. how many serial numbers can be generated?

Simplify the expression. -2/5(10+15m-20n)

What is the expression in factored form? -20x^2 - 12x a. 4x(5x+3) b. -4x(5x-3) c. -4(5x+3) d. -4x(5x+3)

Consider a cube that has sides of length l. now consider putting the largest sphere you can inside this cube without any point on the sphere lying outside of the cube. the volume ratio -volume of the sphere/ volume of the cube is 1. 5.2 × 10−1 2. 3.8 × 10−1 3. 1.9 4. 2.5 × 10−1 5. 3.8