Riley earned $21,500 during her first year as an interior designer. each year she work for that company, she earns a 3% raise. find her total earnings during her first seven years on the job.

Calculate her pay every year then add:

Year 1: 21, 500

Year 2: 21,500 x 1.03 = 22,145

Year 3: 22,145 x 1.03 = 22,809.35

Year 4: 22809.35 x 1.03 = 23,493.63

Year 5: 23493.63 x 1.03 = 24,198.44

Year 6: 24198.44 x 1.03 = 24,924.39

Year 7: 24,924.39 x 1.03 = 25,672.12

Total made: 21, 500 + 22,145 + 22,809.35 + 23,493.63 + 24,198.44 + 24,924.39 + 25,672.12 = 164,742.93

the answer is d. 75%

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