Rectangle abcd has four right angles. what is the sum of its angle measures?

360 degrees total, 90 degrees each

Step-by-step explanation:

a rectangle's angles add up to 360 degrees, so if you divide 360 by 4, each angle is 90 degrees and all right angles are equal to 90 degrees

answer: a.

step-by-step explanation: the answer is a. because, you need to converge the fractions to find a solution.

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