At a? school, 171 students play at least one sport. this is 30? % of the students at the school. how many students are at the? school?

570

Step-by-step explanation:

100% represents the total number of students at the school

Divide 171 by 30 to find 1% then multiply by 100 for total

total number of students = × 100 = 570

answer: it is d

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