Esmerelda rents a car from a company that rents cars by the hour. She has to pay an initial fee of \( \$ 52 \), and then they charge her \( \$ 8 \) per hour. She has \( \$ 144 \) available to spend on car rental. What is the greatest number of hours for which she can rent the car? (The car cannot be rented for part of an hour.) 11.5 hours 18 hours 12 hours

c) \( \frac{5}{6}-\frac{7}{8}+\frac{11}{12} \)

RESOLVER 4) \( \frac{20}{8} \cdot \frac{4}{3}:\left(-\frac{5}{6}\right)= \)

Exercise 4.1 1 Work out the highest common factor (HCF) of \( \begin{array}{ll}\text { a } 8 \text { and } 12 & \text { b } 6 \text { and } 15 \\ \text { c } 7 \text { and } 35 & \text { d } 24 \text { and } 40\end{array} \) \( \begin{array}{l}2 \text { Which fraction is larger in each pair? }\end{array} \)

3. (a5-g18-14) Ko'p qavatli uyning 4 - qavatigacha bo'lgan masofa 12 metr. Shu uyning 12 -qavatigacha bo'lgan masofa necha metr? \( \begin{array}{llll}\text { A) } 48 & \text { B) } 44 & \text { C) } 36 & \text { D) } 33\end{array} \)

A ladder has 50 rungs. The bottom rung is 1 m long. Each rung is \( 12,5 \mathrm{~mm} \) shorter than the rung beneath it. Determine the total length of wood required to make 50 rungs.