Answer:
3
Step-by-step explanation:

Hope this helps!
Answer:
one hundred billion
Step-by-step explanation:
10^6 x 10^5 = 10^11
10^11 = 100,000,000,000 or one hundred billion
I hope that's what you meant ^-^
A 2 over 3 because 2 and 3 both go in to 6 whereas the others don't.
I am thinking your answer is 78 students. You do 1/5 times 390. And I think the the part about the dog is just extra information.
Multiply the two values together. 7.62 x 1.23 = 9.3726
10^2 x 10^4 = 10^6.
9.3726 x 10^6 is the answer in Scientific Notation.