In 2011, it was estimated that the number of u. s households which had dogs as pets was 4.33 x 10^7 and the average number of dogs per household was 1.6 based on the infomation, approximately how many dogs were household pets in the us in 2011 in scientific notation

a. 2.71 x 10^7
b. 3.70 x 10^8
c. 5.33 x 10^8
d. 6.93 x 10^7