Creating a function to validate required fields generally involves retrieving the values of the required fields and checking if the value of any of them is .

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.

At $1.32 million, they closed last month percent above what they paid in 2007." how much did they pay in 2007?

Convert (-3,0) to polar form. a. (3,0’) b. (-3,180’) c. (3,180’) d. (3,360’)