In 2014, the attendance at Jefferson School's Fall Festival was 650 . In 2015 , the attendance was 575 . What was the percent change in attendance from 2014 to 2015? Round to the nearest whole percent.

Find the value of \( k \) that makes \( f(x) \) continuous at \( x=0 \) \[ f(x)=\left\{\begin{array}{ll}\frac{-5 x}{x^{2}-2 x} & \text { if } x \neq \\ k & \text { if } x=\end{array}\right. \] \( k=\square \)

\( f(x)=x^{2}-x-1 \). On pose \( x_{0}=2 \). a. Résoudre l'équation \( x^{2}-x-1=0 \). On note \( \Phi \) la solution positive de cette équation. b. Montrer que pour tout entier naturel \( n \), on a: \( x_{n+1}=\frac{x_{n}^{2}+1}{2 x_{n}-1} \). c. Soit \( g \) la fonction définie sur \( [1 ;+\infty[ \) par \( g(x)=\frac{x^{2}+1}{2 x-1} \). Étudier les variations de la fonction \( g \).

The perimeter of a rectangular yard is 204 feet. If the width of the yard is 45 feet, what is the length of the yard?

Jika \( F(x)=\sin ^{2} 3 x \) maka \( \frac{d f}{d x} \cdots \)

A stack of 50 cards is 1.9 cm thick. All cards in the stack have the same thickness. How thick is one card? Show your work.