Solve the problem.A zoom lens in a camera makes a rectangular image on the film that is 6 cm × 3 cm. As the lens zooms in and out, the size of the image changes. Find the rate at which the area of the image begins to change (dA/df) if the length of the frame changes at 0.6cm/s and the width of the frame changes at 0.4 cm/s.

A. 1.4 m2/s
B. 4.8 m2/s
C. 2 m2/2
D. 4.2 m2/s


Answer: D

Mathematics

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The statement connects two individual propositions with the word or. State whether the entire statement is true or false, and explain why.There are 25 letters in the English alphabet or the letter c is a vowel.

What will be an ideal response?

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Graph the equation.y = -9

A.

B.

C.

D.

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Solve the problem.If an earthquake has an intensity of x, then its magnitude, as computed by the Richter Scale, is given by   is the intensity of a small, measurable earthquake. (Consider  for this problem.) If one earthquake has a magnitude  on the Richter scale and a second earthquake has a magnitude 

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Mathematics