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Question

# The number of AIDS-related deaths/year in the United States is given by the function $f(t)=-53.254 t^{4}+673.7 t^{3}-2801.07 t^{2} +8833.379 t+20,000$ $(0 \leq t \leq 9)$ with t=0 corresponding to the beginning of 1988. Find the total number of AIDS-related deaths in the United States between the beginning of 1988 and the end of 1996.

Solution

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Step 1
1 of 4

In order to find the total number of AIDS-related deaths in the United States between the beginning of $1988$ and the end of $1996$ we will use the $\textbf{fnInt}$ function on the $\textsf{TI-83/84}$ calculator. To make sure that the result will have $4$ decimal places we will do the following:

Press the $\boxed{\textbf{mode}}$ key then the down arrow key once. Select the float line. Next, we use the right arrow key to highlight $4$ and press $\boxed{\textbf{Enter}}$. To proceed press $\boxed{\textbf{math}}$ use the down arrow key to find the function $\textbf{fnInt}$ (and press Enter).

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