2. Em um jogo de futebol a perda energética é de aproximadamente 580 kcal/hora. Se um jogador participa 90 minutos do jogo, pode-se dizer que ele gasta aproximadamente: a) 470 kcal . b) 670 kcal . c) 870 kcal . d) 770 kcal .

Determine whether the following sentence is true or false. The variables in the polynomial \( 22 x-x y+w^{2}-x y^{2} \) are \( w, x \), and \( y \). Choose the correct answer below and, if necessary, fill in the answjer box to complete your choice. A. The statement is true. B. The statement is false. The variables are (Use a comma to separate answers as needed.)

5. Diketahui \( D=\left[\begin{array}{ccc}8 & 5 & -1 \\ -2 & 3 & 3 \\ 12 & 6 & -4\end{array}\right] \), tentukanlah : \( \begin{array}{ll}\text { a. } \operatorname{det}(\mathrm{D}) & \text { b. } \operatorname{det}(2 \mathrm{D})\end{array} \)

to \( 0.9 c+1.89 r=17.01 \)

Express the distance \( 39,000,000 \) meters using scientific notation in meters and then in millimeters. The distance \( 39,000,000 \) meters is expressed as \( 3.9 \times 10^{7} \) meters in scientific notation. (Use scientific notation. Use the multiplication symbol in the math palette as needed.) When converted to millimeters, the distance \( 39,000,000 \) meters is expressed as \( \square \) millimeters in scientific notation. (Use scientific notation. Use the multiplication symbol in the math palette as needed.)

b) \( 1-\frac{5}{2}-\frac{4}{3} \)