A man can paint a door in 1 1/4 hour? How many similar doors can paint in 7 1/2

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Step-by-step explanation:

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6 doors

Step-by-step explanation:

1 1/4 + 1 1/4 = 2 1/2 +2 1/2 = 5 + 2 1/2 = 7 1/2

1          2                   3+4          5+6

have a good day

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

m∠a is 90°

m∠b is 40°