62. Height of a Projected Rock A rock is projected directly upward from ground level with an initial velocity of 90 ft per sec. (a) Give the function that describes the height of the rock in terms of time \( t \). (b) Determine the time at which the rock reaches its maximum height and the maxi- mum height in feet. (c) For what time interval will the rock be more than 120 ft above ground level? (d) After how many seconds will it hit the ground? 63. Area of a Parking Lot One

ACTIVIDAD 1 - 1. Reúnanse en parejas para resolver los siguientes ejercicios de balanceo de ecuaciones: a. \( \mathrm{CaF}_{2}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow \mathrm{CaSO}_{4}+\mathrm{HF} \) b. \( \mathrm{NaOH}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow \mathrm{Na}_{2} \mathrm{SO}_{3}+\mathrm{H}_{2} \mathrm{O} \) c. \( \mathrm{Mg}+\mathrm{O}_{2} \rightarrow \mathrm{MgO}_{2} \) d. \( \mathrm{N}_{2}+\mathrm{H}_{2} \rightarrow \mathrm{NH}_{3} \) e. \( \mathrm{Fe}+\mathrm{Cl}_{2} \rightarrow \mathrm{FeCl}_{3} \)

\[ \frac{1}{9 x^{2}-4}=\frac{A}{3 x+2}+\frac{B}{3 x-2} \] Multiply both sides of the equation by the least common multiple of the denominat \( 1=A(\square)+B(\square) \)

¿Qué indica la regla de signos de Descartes sobre el número de raíces positivas en un polinomio?

Round to the nearest hundred to estimate \( 557-258 \) The estimated difference is

4 point A garden has 200 pounds of watermelons growing in it. Every day, the total amount of watermelon increases by 5 pounds. At the same time, the price per pound of watermelon goes down by 1 c . If the current price is 90 c per pound, how much longer should the watermelons grow in order to fetch the highest price possible? 20 days 25 days 2.5 days Previous