19. Rhonda raised $245 for her softball team's fundraiser. She wants to raise no less than $455. Write and solve an inequality to determine how much more money Rhonda must
raise to reach her goal. Let d represent the amount of money in dollars Rhonda must
raise to reach her goal.

D

Step-by-step explanation:

245 + d > 455; d > 210

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step-by-step explanation:

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