00:01
Okay, in this question of function is given that is st equals to 0 .73 t square plus 15 .8t plus 2 .7, okay, where t is from 0 to 8.
00:15
And here, s denotes to the solar cell kilowatt hour use, okay, that is measured in millions kilowatt hour, okay? and t is that is projected in t e .rs.
00:31
This solar cell kilowatt are used projected in this t years where t is from 0 to 8 and t equals to 0 corresponding to year 2000.
00:44
And what we have to find out? we have to find out part a.
00:48
What was the number of projected solar cell kilowatt hours used in 2000? using united states for 2006 so for 2006 t will be six okay because for year 2000 t is zero so t equals to six for 2000 for sorry here for okay for 2006 so we will put t equals to six in the in this equation we will get s six okay and this will be as six it is 0 .73 multiplied by 6 square plus 15 .8 multiplied by 6 plus 2 .7.
01:32
And when we solve, this will be 0 .73 multiplied by 36, it is 26 .28 plus 15 .8 multiplied by 6, that is 94 .8 plus 2 .7.
01:44
And when we solve, it will be 123 .78.
01:48
Okay.
01:49
And the unit is million kilowatt hour.
01:52
So it as 6, it will be 1 .23 .7...