What is the ratio 4/7/5/7 in simplest form

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)

The price of a visit to the dentist is \$50$50. if the dentist fills any cavities, an additional charge of \$100$100 per cavity gets added to the bill. if the dentist finds nn cavities, what will the cost of the visit be?