How many five-digit codes can be made if the first number cannot be a 0 or a 1 and no numbers can repeat?

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.

Four individuals pool money together to start a new business and agree to split the profits equally. n invests $6,000, x invests $2,000, y invests $8,000 and z invests $4,000. if the profits for the first month were $100,000, y receives than if the profits were divided in proportion to how much they invested.