38. Calcula la suma de los 5 primeros terminos de estas progresiones geométricas mediante la fórmula Despues, escribe los términos, sumalos y comprueba que lo has hecho bien \( \begin{array}{ll}\text { a) } a_{1}=3, a_{4}=81 & \text { d) } a_{1}=8, a_{2}=4 \\ \text { b) } a_{1}=-3, a_{4}=24 & \text { e) } a_{1}=\sqrt{5}, a_{3}=4 \sqrt{5}\end{array} \)

The equation \[ R(v)=\frac{6800}{v} \] can be used to determine the heart rate, \( R \), of a person whose heart pumps 6800 milliliters \( (\mathrm{mL}) \) of blood per minute and \( v \) milliliters of blood per beat. Complete parts a) through c\( ) \) below.

Simplify. \( \sqrt[3]{72} \)

Vocabulary Describe the relationship between the base and the exponent in \( 4^{3} \). Lesson \( 3-1 \)

Express 4 3/8 as a decimal correct to 3 significant figures(A) 4.30 (B) 4.37 (C) 4.38 (D) 4.40

1. \( \frac{1}{3} \) of the teachers at Panther's Elementary wear glasses. \( \frac{3}{4} \) of the teachers who wear glasses are female. What fraction of the teachers at Panther's Elementary are females who wear glasses? \( \begin{array}{ll}\text { A } \frac{1}{2} & \text { B } \frac{1}{3} \\ \text { C } \frac{1}{4} & \text { D } \frac{1}{6}\end{array} \)