As an estimation we are told 5 miles is 8 km.
Convert 22.3 miles to km?? .​

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

investment b is an ordinary annuity with $3,909.64 in the account after one year.

step-by-step explanation:

step-by-step explanation:

the answer is -1 1/5, also a

hope i

-lavira : )