True or false 0.02 1/10 of 2

Samantha swam upstream for some distance in one hour. she then swam downstream the same river for the same distance in only 12 minutes. if the river flows at 4 mph, how fast can samantha swim in still water?

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?

How many zeros does this polynomial function, y=(x-8)(x+3)^2