How do i find this composite figure?

What is the range of this function? all real numbers such that y ≤ 40 all real numbers such that y ≥ 0 all real numbers such that 0 ≤ y ≤ 40 all real numbers such that 37.75 ≤ y ≤ 40

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base