In 2015, the population of the united states was approximately 320 million. express this number in scientific notation.

Step-by-step explanation:

Scientific notation was designed to write numbers which have too many zeroes either to the left or to the right.

For example

The negative sign of the exponent means that you have to move the decimal point 7 places to the left and replace the space with a “0” to get the original number.

The positive sign of the exponent means that you have to move the decimal point 9 places to the right and replace the space with a “0” to get the original number.

In this case, our number is 320 million:

320,000,000

and we can see this is equals to

the anwser is d) 75°

step-by-step explanation: