Someone pleas help me ! A sample of a radioactive isotope had an initial mass of 490 mg in the year 1995 and
decays exponentially over time. A measurement in the year 1998 found that the
sample's mass had decayed to 240 mg, What would be the expected mass of the
sample in the year 2005, to the nearest whole number?

here is your mark brainliest

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