Charles buys 60 packs of pens. There are 12 pens in each pack.
Each pack costs £2.80.
Charles sells each pen for 40p but he only manages to sell
2/3
of the pens.
How much profit did he make

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.

In order to be invited to tutoring or extension activities a students performance 20 point higher or lower than average for the

An engineer scale model shows a building that is 3 inches tall. if the scale is 1 inch = 600 feet, how tall is the actual building?