What is the value of 5.7 × 108?
a. 5,700,000,000
b. 57,000,000
c. 570,000,000
d. 5.7
what are the prime factors of 625?
a. 5, 5, 5, 5
b. 5, 5, 25
c. 1, 5, 5, 5, 5
d. 25, 25
what is the value of 324?
a. 648
b. 128
c. 1,048,576
d. 18

i think it would be reparing roads  

lincoln presided over the union victory in the american civil war, which dominated his presidency. a former whig, lincoln ran on a political platform opposed to the expansion of slavery in the territories. his election served as the immediate impetus for the outbreak of the american civil war.