Choose the appropriate metric unit for the mass of concrete in a section of sidewalk? a: kilogram b: milligram c: gram d: meter

2÷6+1/2 to the second power plus one

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

Will gve pints stars and brainliest