2) Un oggetto alto \( 1,0 \mathrm{~cm} \) è posto a sinistra di una lente convergente la cui distanza focale è 30 cm . Costruisci límmagine dell'oggetto con la procedura suggerita nel- la scheda Operativamente e un foglio di carta millime- trata. Misura laltezza dell'immagine che hai ottenuto e la sua distanza dalla lente.

1. Si: \( \quad A=4+\frac{1}{3+\frac{1}{\square}} \quad \mathrm{y} \) Hallar: \( B-2 A \)

12. ถ้าต้องการรับข้อมูลเก็บไว้ในตัวแปร number ที่ใช้เก็บข้อมูลตัวเลขจำนวนทศนิยม ควรใช้คำสั่งในข้อใด \( \begin{array}{ll}\text { 1. number }=\text { input("Number : ") } & \text { 2. number }=\text { int(input("Number : ") } \\ \text { 3. number }=\text { float(input("Number : ") 4. number }=\text { str(input("Number : ") }\end{array} \)

COVERING THE IDEAS 1. In Parts a-c, suppose the price of an item is 50 dollars. What is the total amount you will pay in each situation? a. There is a \( 6 \% \) tax. b. The item is on sale at \( 35 \% \) off and there is no tax. c. There is a \( 6 \% \) tax and the item is on sale at \( 35 \% \) off. d. Answer Parts a-c if the original price of the item is \( P \) dollars.

2. Out of fifty commuters, 24 are taking the MRT and 19 are taking the bus. If ten commuters are taking both means of transportation, a. How many commuters are taking neither the two means of transportation? \( A=( \) commuters taking the MRT \( )=24 \) \( B=( \) commures taking the Bur \( )=19 \) \( C=( \) commulers taking both theMRTand buc \( )=10=90-33-17 \) b. How many are in either two means of transportation? c. How many commuters are taking the MRT only? \( =24 \) d. How many commuters are taking the bus only? - 9

1. A person can walk about 2.5 miles an hour. So in \( t \) hours, a person can walk \( d \) miles, where \( d=2.5 t \). a. Graph \( d=2.5 t \) with a graphing calculator on the window Xmin \( =-1, X \) max \( =3 \), and Ymin and Ymax of your choosing. b. Graph \( y=3.5 \) on the same screen and use it to estimate a solution to \( 2.5 t=3.5 \). c. Solve \( 2.5 t=3.5 \) to check your answer to Part b. d. What does the solution to \( 2.5 t=3.5 \) represent?