3. Two computers Model A and B are working to do
computations. Model B is the upgraded version and can work
three times as fast. For a task, 20,000 computations are done
by Model A and 90,000 computations are done by Model B, and
it takes a total of 100 seconds. How fast does each Model
perform computations?
(Note: time = computations / rate)

a) Let x = rate of computation for A. Write a rational equation
which models the above, using:
total computational time = time for A + time for B

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.)