Which of the lollowing is most likely to bo used bya marketing firm seeking to map patterns of lifo style characteristics in the United States (A) States (B) Zip codes (C) Nonmetropolitan areas (D) Congressional districts (E) Counties

b. Soit \( f^{\prime \prime} \) la dérivée seconde de \( f \) sur \( [0 ; 10] \). Montrer que \[ f^{\prime \prime}(x)=\frac{e^{45-x}\left(e^{4,5-x}-e^{-0,6}\right)}{\left(e^{-0.5}+e^{4,5-x}\right)^{3}} \]

Cilkulate the area bounded by: 1. \( y=2 x+1 \), the \( x \)-axis, the \( y \)-axis and \( x=3 \).

3. (Unisc-SC) A parte real do número complexo \( z=\frac{1+(3 i)^{2}}{1-i} \) é \( \begin{array}{ll}\text { i) } 1 & \text { d) }-2 \\ \text { b) }-1 & \text { e) }-4\end{array} \)

Math on the Spot Sophia uses \( 3 \frac{3}{4} \) cups-bf flour for each cake she makes. She has a 10 -pound bag of flour that cost \( \$ 8.79 \) and contains 152 quarter-cup servings. A. How many cakes can Sophia make with this flour? B. Use your answer from Part A to find the cost of the flour for each cake Round your answer to the nearest cent.

Solve the equation. Check your solutions. (Enter your answers as a comma-separated list.) \[ 4 x^{2}(x-1)^{1 / 3}+10 x(x-1)^{4 / 3}=0 \] \( x=\square \)