Our 2 variables in this experiment are the height we drop blood from and the size of the blood droplets. Decide which one is the independent variable and which is the dependent variable. Independent variable: Dependent variable:

2. Un auto va a une velocided de y10 \( \mathrm{Km} / \mathrm{ho} \) ¿En aunto timpo reconre 3850 km ?

e) \( \left(\frac{-9}{3}\right)(-7) \) g) \( \left(\frac{24}{9}\right)\left(\frac{-56}{48}\right)= \) \( 1\left(\frac{-21}{-7}\right)\left(\frac{-9}{3}\right) \)

a) \( \begin{array}{l}x+\text { si } x \leq-2 \\ a x+b \text { si }-2

Find the range, mean, and standard deviation for the data set. \( 20,19,19,21,22,19,21,23,23,21 \) The range is 4 . (Type an integer or decimal. Do not round.) The mean is 20.8. (Type an integer or decimal. Do not round.) The standard deviation is (Type an integer or decimal rounded to two decimal places as needed.)

\( \left. \begin{array} { l } { a = 5 , b = - 1 , c = 3 , d = - 2 } \\ { - a + ( - b ) - \{ - c - ( - d + a ) + [ - b + ( - b ) ] - d - [ - ( - a + b ) - c ] - d + ( - a ) \} } \end{array} \right. \)