A van travels at a constant speed of 15m/s for 60 seconds. for 30 seconds. a. show this on a graph. Put time on the horizontal axis and speed on the vertical axis.
b. The speed of a car increases steadily from 0 m/s to 30 m/s over 20 seconds. It travels at 30m/s for 30 seconds. Then the speed steadily decreases from 30 m/s to 0 m/s in 10 seconds. show the speed of the car on the same graph.
c. For how many seconds is the car travelling faster than the van

Fatima plans to spend at least $15 and at most $20 dollars on sketch pads and pencils. if she buys 2 sketchpads, how many pemcils can she buy while staying in her price range? fatima can buy between and pencils. ? (type whole numbers. use ascending? order.)

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?

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.)