7. Chloe and Ben are in motorboats at the center of a lake. At time t=0, Chloe b

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7. Chloe and Ben are in motorboats at the center of a lake. At time t=0, Chloe begins traveling south at a speed of the 60km/h. One One minute later, Ben takes off, heading east at a speed of 40km/h. At what rate is the distance between them increasing at t=12min?. Draw a picture and label variables. Show the equations and the work used to find your answer.

8. For the function y= x^3-2x^2+3, identify the local extreme values, the intervals of increase and decrease, and the intervals of concavity. You may use a calculator to check your answers, but you must shoe your work to receive credit. Find:
Local Max:
Local Min:
Increasing:
Decreasing:
Inflection Points:
Concave up:
Concave Down:

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