the relationship between 5.34 x 10^5 and 5.34 x 10^-2

5.34 * 10^-2 , for exponent -2 we move the decimal point 2 places to the left

Now we compare 534000 and 0.0534
0.0534 is 10,000,000 times less than 534000
Or we can say 534000 is 10,000,000 times greater than 0.0534
is 10,000,000 times greater than 
$9 a day for 8 days.
So, for every day that went by they earned $9. In other words the answer is the Amount of Money Earned per day multiplied by the number of days!
So!
$9 * 8days
Or you can also think of it as this:
9+9+9+9+9+9+9+9
Our answer comes out to be 72!