Select the correct answer. What is the inverse of function f?
f(x) = VI +7
OA. 1-1(x) = (x – 7)?, for r > 7
OB. 1-1(x) = x2 + 7, for r > -7
OC. f-1(x) = (x + 7)?, for r > -7
OD. 1-14) = 12 – 7, for r > 7
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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

ending amount = beginning amount / (2^n)

where "n" = number of half-lives (or elapsed time / half-life)

ending amount = 50 mg / (2 ^10 / 5.3)

ending amount = 50 mg / (2 ^ 1.8867924528)

ending amount = 50 m / 3.6981210597

ending amount = 13.5203794557 mg

or about 13.5 mg remain

source:  

16 would be your answer