The rate of change is +2
as an ordered pair it would be (1,-3),(2,-1)(3,1),(4,3)
72 is 50 or above so you round it up.
<u />572 to the nearest hundred is <u>600</u>
$200 x 0.00295
= $0.59
The price of the toy car in 1968 was $0.59
A 120 watt light-bulb is a 0.120 kilowatt light bulb.
In one hour, it uses 0.120 kilowatt-hour of energy.
If electrical energy costs $0.20 per kilowatt hour, then that light bulb costs
(0.120 kilowatt-hour / hour) x (0.20 dollar / kilowatt-hour) =
(0.120 x $0.20 / hour) =
$0.024 / hour = <span>2.4¢ per hour </span>