A surplus store gives a scratch-off ticket to 2000 customers as they leave with their groceries. Can we expect t customers' average winnings to be close to the average winnings for the entire population of the scratch-off tic holders?

2. ¿Qué medida es más exacta 1 m es a 100 mm ; o 300 m es a \( 0,3 \mathrm{~km} \) ?

Integrate the function \( H(x, y, z)=6 x^{2} \sqrt{17-8 z} \) over the parabolic dome \( z=2-2 x^{2}-2 y^{2}, z \geq 0 \) \( \iint_{S} H(x, y, z) d \sigma=\square \) (Type an exact answer, using \( \pi \) as needed.)

1.5 If \( X \sim N(9,16) \), find \( P(X>18) \) \( \begin{array}{l}\text { A. } 0.2123 \\ \text { B. } 0.4875 \\ \text { C. } 0.4878 \\ \text { D. None of the above }\end{array} \)

Find by inspection all values for \( x \) that make the following equation true. \( |x|=7 \) Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The solution is (Use a comma to separate answers as needed.) B. There is no solution.

3. Ordena de mayor a menor los siguie tes decimales \( 3,4,4,3,39 \)