數學與統計 大學 2年以上以前

求詳解🙏🙏🙏

(1 point) The manager of a large apartment complex knows from experience that 120 units will be occupied if the rent is 300 dollars per month. A market survey suggests that, on the average, one additional unit will remain vacant for each 10 dollar increase in rent. Similarly, one additional unit will be occupied for each 10 dollar decrease in rent. What rent should the manager charge to maximize revenue?

數學與統計 大學 約3年以前

請問這題怎麼解，感謝🙏

RETIREMENT ANNUITY When she is 30, Sue starts making annual deposits of $2,000 into a bond fund that pays 8% annual interest compounded continuously. Assuming that her deposits are made as a continuous income flow, how much money will be in her account if she retires at age 55?

數學與統計 大學 3年以上以前

第19題求解 看不太懂題目再問什麼🥺🥺

y your answer to part (a) using an appropriate table. 18. Construct a truth table for each of the following expressions. a) '(P10) b) "PA'Q c) (P-Q)('9- "P) d) P→( QR) e) (P)R f) '(P v Q R g) '((P v 9) + R) 19. Let P be the proposition 2 = 5. If possible, find a proposition such that PvQP Q is true. If possible, find a proposition such that PvQPAQ is false. 20. a) Write the truth tables for the expressions (PHQ) - R and PH( OR). b) Find propositions P, Q, and R such that one of the two compound proposi- tions (PH2)→ R and PH( QR) is true and the other is false. -