Question 725094
Just replace the t with 10 and enter it into your calculator. If your calculator has buttons for parentheses and for the number e, you could enter the whole expression at once:
800*(e^(-0.028*10))<br>
If there is no button for "e" then use ln^(-1)(1) or 2.7182818284590452353602874713527 (or a rounded off version of this).<br>
If there are no buttons for parentheses then raise e to the -0.28 power (since (-0.028 * 10 = -0.28) and then multiply by 800.<br>
And last, round the answer you get to the nearest whole number.