4. ¿Cuál de las siguientes expresiones no pertenece a los racionales? \( \begin{array}{lllll}\text { A) } 12 & \text { B) } \frac{5}{0} & \text { C) } \frac{0}{7} & \text { D) } 1,23 & \text { E) } 0, \overline{9}\end{array} \)

Find the difference. 1. \( 4 \frac{1}{2}-2 \frac{3}{4}=\square \)

Convert the fraction below into a decimal \[ \frac{21}{40} \]

4. Ms. Bailey has a flight from New York to Paris that covers the distance shown in 7 hours. If the plane travels at the same speed per hour, how many miles will Ms. Bailey travel after 4 hours? Show your work.

3. Expresar los siguientes números en notación decimal: a) \( 2,33 \times 10^{4} \)

Question 3 (1 point) A math teacher has 15 bottles of glue for students to use for their journals. Each student needs a \( 1 / 3 \) of a bottle to glue in their new page of notes. How many students can glue in their notes? a \( 15 / 3 \) b 3 d d d