Question

express in standard form -15/-200​

Answer 1

Answer:

lick this I think

Example

Write 0.000 001 2 in standard form:

0.000 001 2 = 1.2 × 10-6

It’s 10-6 because the decimal point has been moved 6 places to the right to get the number to be 1.2

On a calculator, you usually enter a number in standard form as follows: Type in the first number (the one between 1 and 10). Press EXP . Type in the power to which the 10 is risen.

Manipulation in Standard Form

This is best explained with an example:

Example

The number p written in standard form is 8 × 105

The number q written in standard form is 5 × 10-2

Calculate p × q. Give your answer in standard form.

Multiply the two first bits of the numbers together and the two second bits together:

8 × 5 × 105 × 10-2

= 40 × 103 (Remember 105 × 10-2 = 103)

The question asks for the answer in standard form, but this is not standard form because the first part (the 40) should be a number between 1 and 10.

= 4 × 104

Calculate p ÷ q.

Give your answer in standard form.

This time, divide the two first bits of the standard forms. Divide the two second bits. (8 ÷ 5) × (105 ÷ 10-2) = 1.6 × 107