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

What is the product of the radical expression. (7-2square root) (8+2 square root)

Cd is the perpendicular bisector of both xy and st, and cy=20. find xy.

Me its important ! marge runs an ice cream parlor. her speciality is triple chocolate sundaes. she can prepare 1 sundae every 2 minutes, and she earns $1.20 for each sundae she makes . if she just makes sundaes for a single shift of at most 4 hours and at least 2 hours , which function relates her earnings to the number of minutes she works?