Lena ran for president of the chess club, and she received 24 votes. There were 30 members in the club. What percentage of the club members voted for Lena?

It is 80 percent. i had this question and got it right. Have a great day

Step-by-step explanation:

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204

first one because it can't have a fraction in it

step-by-step explanation: