What is the expression for f(x) when we rewrite 64^x/4^5x-1 as 4^f(x)?

In a box lenght 1m breadth 60 cm and height 40 cm small rectangular packets of dimension 5 cm into 8 cm into 10 cm are packed. how many such small packets can be packed in the big box?

An appliance store sells lamps at $95.00 for two. a department store sells similar lamps at 5 for $250.00. which store sells at a better rate

What is coefficient of the term of degree of degree 5 in the polynomial below