the sum of 3 numbers is 140 the second is 8 less then the first. the third number is 4 times the second. what are the numbers?

First number: 30

Second number: 22

Third number: 88

Step-by-step explanation:

22 is 8 less than 30

88 is four times more than 22

30 + 22 + 88 = 140

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

part a: 1.08

part b: 27.59