Cálculo de porcentajesI- Transforma las siguientes fracciones en porcentajes a)637/980=
b)2592/3240=

II- Calcula
a)4% de 5000=
b)32% de 18,200=
c)90% de 9000=
d)25% de 444=
e)75% de 800=
f)40% de 555=
g)60% de 660=

III- Completa
a) El 7% de 45 es.
b) El % de 50 es 7.
c) El 8% de es 120.
d) El 0.7% de 840 es

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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

ummm seems that u didnt post the attachement !

where does the z at is it on the x axes or on the y axes any way if it is on the y axes put it horizontally and if it is on the x axes put it vertically