80. Поїзд рухався 2 год зі швидкісто 3 год зі швидкістю 69,2 км/год. Знайди середню швид- кість поїзда протягом цього часу руху.

Ex 1. Suppose you invest \( \$ 404 \) in a par stock at the beginning of the trading day yesterday The stock decreased \( 3.56 \% \) during the trading day yesterday and \( 2,43 \% \) today. How much money do you have in the par stock now? Use any Excel method and put your answer in cell D11.

1. Which event convinced people that James Monroe's presidency was ushering in an "Era of Good Feelings?" Monroe's opening of the American west to settlement by immigrants from any European nation Monroe's support of Henry Clay as Speaker of the House after facing Clay as an election opponent government spending on internal improvements such as new roads Monroe's attempts to promote national unity by traveling around New England to talk with important Federalists

Multiply. \[ (v) 4 \]

Solve for \( t \) \[ \begin{array}{l}-8 t=-9 t+6 \\ t=\end{array} \]

Se deja caer en un pozo una piedra que en un principio es- tá en reposo. El sonido del chapoteo se escucha exacta- mente 2.00 s después. Determine la profundidad del pozo si la temperatura del aire es de \( 10.0^{\circ} \mathrm{C} \).