Question

A certain NYC taxi driver has decided to start charging a rate of r cents per person per mile. How much, in dollars, would it cost 3 people to travel x miles if he decides to give them a 50% discount?

a. 3xr/2
b. 3x/200r
c. 3r/200x
d. 3xr/200
e. xr/600

Answer 1

`(3xr)/(200)`

Explanation:

A certain NYC taxi driver has decided to start charging a rate of r cents per person per mile

rate is cents . convert it in to dollars

1 cent = 1/100 dollars

r cents = r/100 dollars

Each people travels x miles

cost is
`(r)/(100) \cdot x`

For 3 people the cost is

`3(r)/(100) \cdot x`

Discount is 50%, so we divide by 2

`(3(r)/(100) \cdot x)/(2) =(3xr)/(200)`