The population of Hillsborough County in Florida in 2010 was 1,229,226 and the land area was 1,020 square miles. The population increased by 9.7% in 2015.
Part 1: To the nearest whole number, find the population density, in people per
square mile, for Hillsborough County in 2010.
Part 2: To the nearest whole number, how much did the population density, in people
per square mile, increase from 2010 to 2015?

About 1205.12352941 people per square mile in 2010

About 1329.36306853 people per square mile in 2015

Explanation:

take population and divide by land area

for 2015 pop do total pop divided by 9.7 plus total pop

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.

christopher is 272,195 year old

step-by-step explanation: