2) divide (8.6 x 108) by (3.2 x 103). express your answer in scientific notation.
a) .26875 x 106

b) 2.6875 x 105

c) 2.6875 x 1011

d) 26.875 x 1024

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.