81. Pipe A can fill an empty tank in 45 minutes and pipe B can empty it in one hour. If pipe A is [ ] opened at 10:00 AM and pipe B at 10:15 AM, by what time does the tank get filled? \( \begin{array}{lllll}\text { (a) } 12: 00 \mathrm{PM} & \text { (b) } 12: 15 \mathrm{PM} & \text { (c) } 12: 30 \mathrm{PM} & \text { (d) } 1: 00 \mathrm{PM} & \text { (e) } 1: 30 \mathrm{PM}\end{array} \)

13) What is \( 270 \% \) of 60 ? \( \begin{array}{ll}\text { 15) } 87 \% \text { of } 41 \text { is what? } & \text { 14) } 73 \% \text { of what is } 156.4 \text { ? } \\ \text { 17) What percent of } 88.6 \text { is } 70 ? & \text { 16) } 9 \text { is what percent of } 84 ?\end{array} \)

Round \( 5.34 \) to the nearest tenth.

4. Una fábrica de dulces produce 1746 paletas en un día. ¿Qué cantidad representan \( \frac{4}{6} \) de la producción total de paletas en un día?

If \( 3^2 \) is calculated, what is the result?

Hockey is an 11 . a-side game, but a team may corsist of up to 16 players with uralimited substitutions allowod throughout a match of 70 minutes duration. foger captains the Buccancers hockey team. He has 16 players for today's match. Ho will play the whole match himsell, as will the goalkeeper. He intends to rotate all the other players in such a way that each of them spends the sarme rotal ampunt of time on the pitch. How ruich time should each player (werept foger and the goalkeeper) spend on the pitch during today's match?