Suppose you make a 4-minute local call using a calling card and are charged 7.6 cents. The post of a local call varies directly with the length of
the call. How much more will it Cost to make a 30-minute local call?
• Which quantity is the dependent quantity?
• How does the word "more" affect the method needed to solve the problem?

9.4.34  question   to estimate the height of a stone  figure, an observer holds a small square up to her eyes and walks backward from the figure. she stops when the bottom of the figure aligns with the bottom edge of the  square, and when the top of the figure aligns with the top edge of the square. her eye level is 1.811.81 m from the ground. she is 3.703.70 m from the figure. what is the height of the figure to the nearest hundredth of a  meter?