D'(p) = -8p + 160
<span>-8p + 160 = 0 </span>
<span>-8p = -160 </span>
<span>p = 20 </span>
<span>~~~ </span>
<span>B) Number of drills sold when p = 20 is </span>
<span>D(20) = [ -4(20)^2 + 160(20) - 270 ] = 1,130 drills </span>
I think this is right, i tried.
You see, if it's typed, it's not hand-written. But if he types 24 wpm, it should take him about 20 minutes to do it.
if the figure is a rectangle the answer is 473
The sum of the degrees for all triangles is 180, so just add the two you have and subtract from 180.
1. 58 + 47 = 105
180 - 105 = 75
Therefore x = 75
2. 91 + 26 = ?
180 - ? = ?
etc
