An insurance company wants to study whether offering incentives for preventative care reduces overall health care costs. They select a random sample of 200 of their customers. Half of the smokers are randomly assigned to be offered the incentive, and the other half are assigned to the control group. The same method is used to randomly assign half of the nonsmokers to the treatment group and half to the control group. What type of experiment design is this? Choose 1 answer: (A) Matched pairs B Cluster (C) Completely randomized (B)

3. \( \int \frac{d x}{e^{x}}= \)

Whe following inequality is given: \( 3(x+7)<\frac{x}{2}+1 \) Solve for \( x \) in the inequality.

15-12. Dos líquidos que no reaccionen químicamente se encuentran en un tubo doblado como el de la figura 15-21. Demuestre que las alturas de los líquidos por encima de su superficie de separación son inversamente proporcionales a sus densidades: \( h_{1} / h_{2}=\rho_{2} / \rho_{1} \). El nivel de presión debe ser el mismo para cada columna: \( \rho_{1} g h_{1}=\rho_{2} g h_{2} \) así que: \[ \frac{h_{1}}{h_{2}}=\frac{\rho_{2}}{\rho_{1}} \]

Hallar la ecuacion de la bisectriz del par de ángulos agudos formados por las rectas \( 4 x-3 y=8 \) y \( 12 x-5 y=10 \). Representa geométricamente

\( if3\sqrt {n}=5findapossiblvalue(s)ofn. \)