Find the value of the function for the given value of x f(x) = - [[ - x ]], for x =2.5

The amount of revenue generated by a food deliveries company (in billions of dollars) can be approximated by the function f(x) = 0.769(1.125)*, where x = 1 corresponds to the first quarter of the year 2018. Find the first full quarter in which the revenue generated from food deliveries exceeded the following amounts. (a) $4.9 billion (b) $6.9 billion (a) The first full quarter in which the revenue generated exceeded $4.9 billion was the (Type a whole number.) quarter of the year third first fourth second

Is f(x)=2/x-7 one to one