A120 watt light bulb uses about 0.1 kilowatt of electricity per hour. if electricity costs 0.20$ per kilowatt hour, how much does it cost to have the bulb on for an hour?

How do i do this activity, is appreciated

Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 23 = 10x a. -1.93, 11.93 b. 1.93, -11.93 c. 1.93, 11.93 d. -1.93, -11.93

The graph of a function f(x)=(x+2)(x-4). which describes all of the values for which the graph is negative and increasing? all real values of x where x< -2 all real values of x where -2