Please help with this I keep gettin the wrong answer!!!

Denote the distance from initial position of Emily to the park is D

=> As the first speed is 5 (mile/hour) and second speed is 9 (mile/hour) and total time is 1 and 5/9 hour, we have:

D/5 + D/9 = 14/5

=> (9D + 5D)/45 = 14/5

=> 14D/45 = 126/45

=> 14D = 126

=> D = 9 (mile)

Hope this helps!

:)

i dont know sorry

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