How do 0.5 becomes a fraction i dont understand plz help

Find the height of a square pyramid that has the volume of 32 ft.³ and a base lengthof 4 feet

True or false? a circle could be circumscribed about the quadrilateral below.

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?