exam Maths Puzzle Numerical Ability

For the follwoing I need to find

a. f^-1(x)
b. Graph f and f^-1 in the same rectangular coordinator system
c. Use interval notation to give the domain and range of f and f^-1

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exam Other Question

A rectangle is 5 times as long as it is wide. If the area is 125 square feet, find its perimeter. Supply and Demand Let the supply and demand functions
for butter pecan ice cream be given by

p=S(q)=2 over 5 q and p=D(q)=100- 2 over 5 q,

where p is the price in do