00:01
Hi, from the question given that suppose that the manufacturer of a gas cloths dryer has found that when unit price is p dollars then the revenue function r of p is equal to minus 2p square plus 4000p.
00:22
So, here in part a we need to find at what price the revenue is 0.
00:27
So, that is r of p is 0 then we need to find the value of p.
00:31
So, minus 2p square plus 4000p is equal to 0 this is 4000 and here remove 2p.
00:43
So, we have minus p plus 2000 will be equal to 0.
00:51
So, either p is equal to 0 or p is equal to 2000.
00:57
Therefore, price p is equal to 0 or 2000 when r of p is equal to 0.
01:09
Now, let us move on to part b.
01:12
So, here at what range of the price will the revenue exceed 4000000.
01:19
So, revenue will exceed.
01:24
So, 4 double 0 triple 0 is less than or equal to r of p...