Did any of your answers change from your Warm-Up response? If so, why? Record your changes and your explanations below.

\( a ^ { 2 } + b x + c = 0 , X = \frac { - b \pm \sqrt { b ^ { 2 } - 4 a c } } { 2 a } \)

13. \( P \propto \sqrt{y} \) and \( P=77 \) when \( y=121 \). Find the law connecting \( P \) and \( y \). Find \( P \) when \( y=144 \). Also, find \( y \) when \( P=22 \). 14. \( O \) varies inversely as \( z \). If \( Q=7 \) when \( z=15 \), find

1) \( 91=-7(2-3 r) \)

If \( f(x)=x^{2}-2 \) and \( g(x)=x+4 \), find \( (f \circ g)(3) \) and \( (g \circ f)(-2) \) a) \( (f \circ g)(3) \) b) \( (g \circ f)(-2) \) \( (g \circ f)(-2)= \)

5. What is the missing decimal in the box? \( \begin{array}{ll}\text { (1) } 10.508 & \text { (2) } 10.058 \\ \text { (3) } 10.52 & \text { (4) } 10.58\end{array} \)