Please answer two math questions!!!
posted by Esther on .
10. From the 2010 census data, the population of Texas was about 2.5 x 107 people. Florida’s population was about 1.9 x 107. Idaho’s population was about 1.6 x 106. Which of the following statements is true?
a)Idaho has a larger population than Florida.
b)Florida has a larger population than Texas.
c)Idaho has the smallest population.
d)Florida has the largest population.
11. What is 8.57 x 10–4 in standard form?
a)85,700
b)0.00857
c)8,570,000
d)0.000857
Please help!! Need answer now!!

your numbers were probably written as
2.5 x 10^7
which means 2.5 x 10000000 , notice 7 zeros from 10^7
= 25 000 000 > 25 million
do the same with the other numbers and you will be able to compare their sizes.
8.57 x 10^4
= 8.57 x 1/10^4
= 8.57 x 1/1000 > count the zeros in the denominator
= .000857 > how many places to the left has the decimal moved?
does that give you any hints for quick solutions to these kind of problems? 
Thank you :)