Let \( P(t)=39\left(1-e^{-k t}\right)+50 \) represent the expected score for a student who studies \( t \) hours for a test. Suppose \( k=0.39 \) and test scores must be integers. What is the highest score the student can expect? If the student does not study, what score can he expect?

Thich of the following is usually an unknown parameter of the population

3-Determine si la rectas dados son foralelas Pereendicolares o secorics. Justifitoe su reseuesta Decdierte de la recta \( 1\left(m_{1}\right)=2 \) Perdiente de la recta \( 2\left(m_{2}\right)=1 \)

Use the elimination method to evaluate \( \operatorname{det}(A) \) : \( A=\left(\begin{array}{rrrr}0 & 1 & 2 & 3 \\ 1 & 1 & 1 & 1 \\ -2 & -2 & 3 & 3 \\ 1 & 2 & -2 & -3\end{array}\right) \)

\( 13.8 g Fe _ { 2 } O _ { 3 } = \square mol \)

Subtract. \[ -\frac{4 a-8 x}{8 a}-\frac{5 a+6 x}{8 a} \] Simplify your answer as much as possible. \( \square \)