3. The approximate mass of a hydrogen atom is 1.7 X 10-24 grams. The mass of a single lead atom is approximately 3.4 x 10-22 grams. How many times heavier is a lead atom than a hydrogen atom? A. 5 times heavier
B. 20 times heavier
C. 50 times heavier
D. 200 times heavier​

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

%40

step-by-step explanation: