DIVING You dive 21 feet from the surface of a lake in 7 seconds. (Section 1.4 and Section 1.5) a. What is the mean change in your position in feet per second? b. You continue diving. What is your position relative to the surface after 5 more seconds?

\( \left. \begin{array} { | c | l | } { x } & { y = x ^ { 2 } + 2 } \\ \hline 2 & { } \\ { 1 } & { } \\ { 0 } & { } \\ { - 1 } & { } \\ \hline \end{array} \right. \)

\( p=(t.i.u.3) \)

2. Вычислить \( \iint_{S}\left(x^{2}+y^{2}\right) d S \), если \[ S \equiv\left\{x^{2}+y^{2}+z^{2}=9\right\} \]

(7) If \( 4 x=12 \), what is the value of \( 2 x-1 \) ?

Which events are independent? Check all that apply. Each number 1 through 10 is written on a slip of paper, placed in a hat, and randomly picked. Sarah picks a number less than 5, keeps it, and then picks an odd number. A number cube is rolled and a spinner is spun. Henry rolls a multiple of 2 and lands on a red portion of the spinner. Two cards are randomly chosen from a standard deck. Eliza chooses a jack, replaces it, and then chooses a black card. Two pairs of socks are randomly chosen from a drawer. Hayden chooses a black pair of socks, puts them on, and then chooses another black pair. A card is randomly chosen from a standard deck and a dart is randomly thrown. Olivia chooses an ace and the dart hits the bull's-eye.