If the number of bacteria in a colony doubles every five days and on Jan. 16th there were 8,000,000 bacteria, how many bacteria were there on Jan 6th?

Two numbers are of the ratio 3:5. If their difference is 18, find the numbers.

mike and mandy bought the same item mike paid 15000 mandy got a discount and paid 3000 less than mike how much of a discount did she get (find percent)

Solve the equation below for. x. 3 (x - 2) = x + 4

Consider that (x, y) is a solution to the system of equations. What is the product of x and y? 2x - 5y = 10 4x + 3y = 7 A) - 5 2 B) - 1 C) - 2 5 D) 1

cash price of $200 that has been reduced by 20% if the tax rate is 6.5%.

Merideth has a set of ninety 1-inch tiles. If she starts with one tile, then surrounds it with a ring of tile to create a larger square, how many surrounding rings can she make before she runs out of tiles?

five whole numbers are written in order (4, 6, x, y, 10). The mean and median of the five numbers are the same. Work out the values of x and y.

What figures can be drawn in a circle with 2 perpendicular diameters?

Outside temperature over a day can be modeled as a sinusoidal function. Suppose you know the temperature varies between 67 and 83 degrees during the day and the average daily temperature first occurs at 8 AM.

What is decimal expansion?