Jason taylor opened a savings account on the first day of an interest period with a $680 deposit. His account earns 3 1/4% interest and is compounded quarterly. If he does not withdraw or deposit any more money during the quarter, how much interest will his account earn in 3 months ?

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step-by-step explanation:

answer: f = 32.2m

step-by-step explanation: that is the answer

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