Please help What is the quotient?

StartFraction (negative 7) squared Over (negative 7) Superscript negative 1 EndFraction

A) -343

B) -7

C) 7

D) 343

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

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.

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