So to get this the easiest way would be to:
-put 90,000,000 over 186,000 and cancel out zeroes so you have 90,000 divided by 186 ( so it makes more sense in long division later)
-Then divide 90,000 by 186
-get 483.87 seconds
Hope this helped!
1,02x
Is your right answer
There are 22 total fish in the tank because 8 got doubled so 11 would also have to get doubled
let's take admission fee= z
8z+11z=17.50+21.25
19z=38.75
z=38.25/19
z=2.4 (aprox)
Or In case of Kiara 17.50 amount paid in 8 rides
.so 1 ride=17.50/8
=2.1875
same In case of mia
so 1 ride=21.25/11
=1.9318.
but, they are not match so there is problem in your Questions.