(28 divided by 7 + 6 divided by 3) x 1/2

Kapil needed to buy a long wooden beam. he went to two sawmills that each charge an initial fee plus an additional fee for each meter of wood. the following equation gives the price (in dollars) of a wooden beam from the first sawmill as a function of its length (in meters). p = 5+20xp=5+20x

This is different from the first one can someone me

Asphere has a diameter of 10 in. what is the volume of the sphere?