Please help i need help

15.62

Step-by-step explanation:

15.62

first option

Step-by-step explanation:

using pythagoras theorem

a^2 + b^2 = c^2

x^2 + 10^2 = 12^2

x^2 + 100 = 144

x^2 = 144 - 100

x^2 = 44

x =

x = 6.63

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