3 La pista da ballo di un locale ha una forma circolare di raggio \( 3,20 \mathrm{~m} \). Per una festa, il pro- prietario della discoteca vuole allestire un piano bar al centro della pista che occuperà un'a- rea di \( 5,10 \times 10^{4} \mathrm{~cm}^{2} \). Una persona in piedi occupa, in media, una superficie di circa \( 30 \mathrm{dm}^{2} \). Qual è l'area della pista che rimane adibita al ballo? Quante persone in meno potranno stare in pista quando sarà montato il piano bar?

9 from Unit 2, Lesson 9 Noah orders an extra-large pizza. It costs \( \$ 12.49 \) for the pizza plus \( \$ 1.50 \) for each topping. He orders an extra-large pizza with \( t \) toppings that costs a total of \( d \) dollars. Select all of the equations that represent the relationship between the number of toppings \( t \) and total cost \( d \) of the pizza with \( t \) toppings. A. \( 12.49+t=d \) B. \( 12.49+1.50 t=d \) C. \( 12.49+1.50 d=t \) D. \( 12.49=d+1.50 t \) E. \( t=\frac{d-12.49}{1.5} \)

Frank invested \( \$ 5000 \) at \( 8 \% \) simple interest. Part 1 of 2 (a) How much interest will he earn each year? The amount of interest earned each year is \( \$ 400 \). Part: \( 1 / 2 \). 2 . 2 of 2 (b) What will be the total value of the account after seven \( y \) The total value of thfo account after seven years is \( \$ \square \).

\( \left. \begin{array} { l }{ } \\ { h = \frac { 7,35 cm } { 3,5 cm ^ { 2 } } } \\ { h = 2,1 cm } \end{array} \right. \)

13. Find the corresponding time in a city in the Pacific time zone when it is \( 2: 45 \) P.M. in a city in the Eastern time zone. A. \( 12: 45 \) A.M. B. \( 11: 45 \) A.M. C. \( 1: 45 \) P.M. D. \( 10: 45 \) A.M.

2. \( \sqrt{-63}|5 \cdot \sqrt{-84}| 8 \cdot \sqrt{6} \cdot \sqrt{-3} \)