The number of boys is half the amount of the number of girls.
the number of girls in the class is double the amount of the boys.
hope this helps you
Answer:

And we can set equal this derivate to 0 in order to find the critical point and we got:


And we can calculate the second derivate and we got:

So then w can conclude that the value of t = 3.4375 represent the minimum value for the function and we can replace in the original function and we got:

So then the minimum annual income occurs at t = 3.43 (between 2008 and 2009) and the value is 25.094
Step-by-step explanation:
For this case we have the following function:

Where P represent the annual net income for the period 2007-2011 and 
And t represent the time in years since the start of 2005
In order to find the lowet income we need to use the derivate, given by:

And we can set equal this derivate to 0 in order to find the critical point and we got:


And we can calculate the second derivate and we got:

So then w can conclude that the value of t = 3.4375 represent the minimum value for the function and we can replace in the original function and we got:

So then the minimum annual income occurs at t = 3.43 (between 2008 and 2009) and the value is 25.094
That would happen when the factors have opposite signs.
Answer:
You had $30
Step-by-step explanation:
The answer is 30 because he said that he had 10 dollars and 20 which means he had 30 dollars the other money was given to him.
P.S Can I have brainliest? (I don't deserve brainliest the other guy got it first.)
Answer:
The correct answer is 4%
Step-by-step explanation: