A2 + b2 = c2 1. The voltage V of a speaker can be represented by the equation, V = V9x, where x is the power of
the speaker. James wants to buy a speaker with 400 watts of power. What will the voltage be?
2.
2. The hull speed of a sailboat is calculated using the formula V = 1.35VI, where V is the velocity in
knots and L is the waterline length in feet. Brooke is planning on buying a boat with a maximum speed
of 20 knots. How long should the waterline be?
3. A recent study shows that the price of a Toyota Camry is calculated by the function
P = 25,000V150 - 7.5t, where t is time in years. When will a Toyota Camry be worth 20% of the original
price of $25,000?

In may you used 400 kilowatt-hours of energy for electricity. a. calculate the total electrical energy use in joules. b. calculate your average power use in watts. c. assume that your power supplier generates electricity by burning oil. note that 1 liter of oil releases 12 million joules of energy. how much oil is needed to generate the electricity you use? give your answer in both liters and gallons. a. the total electrical energy use was nothing _ joules. (type an integer or a decimal.) b. the average power use is nothing _ watts. (round to the nearest whole number as needed.) c. to generate the electricity you used, nothing _ l is needed. (round to the nearest whole number as needed.) to generate the electricity you used, nothing _ gal is needed. (round to two decimal places as needed.)