8. Find the current that flows in the loop in the clockwise direction. Find the voltage across each resistor and Vac in the circuit in the figure. (20 pts)

## 8. Find the current that flows in the loop in the clockwise direction. Find the voltage across each resistor and Vac in the circuit in the figure. (20 pts)

An open tank contains 5.7m of water covered with 2.6m of kerosene (sp wt = 8KN/m3). Find the pressure at the interface and at the bottom of the tank.

## An open tank contains 5.7m of water covered with 2.6m of kerosene (sp wt = 8KN/m3). Find the pressure at the interface and at the bottom of the tank.

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A community bird-watching society makes and sells simple bird feeders to raise money for its conservation activities. The materials for each feeder cost \$3, and the society sells an average of 20 feeders per week at a price of \$7 each. The society has been considering raising the price, so it conducts a survey and finds that for every dollar increase, it loses 2 sales per week. (a) Find a function P that models weekly profit in terms of price per feeder. (Let x be the price per feeder.) P(x) = (b) What price should the society charge for each feeder to maximize profits? \$ What is the maximum weekly profit? \$

## A community bird-watching society makes and sells simple bird feeders to raise money for its conservation activities. The materials for each feeder cost \$3, and the society sells an average of 20 feeders per week at a price of \$7 each. The society has been considering raising the price, so it conducts a survey and finds that for every dollar increase, it loses 2 sales per week. (a) Find a function P that models weekly profit in terms of price per feeder. (Let x be the price per feeder.) P(x) = (b) What price should the society charge for each feeder to maximize profits? \$ What is the maximum weekly profit? \$

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