A large city passed a new tax on sugary beverages. A few months after the tax goes into effect, the mayor wants to use social media to learn about how residents feel about the tax. The mayor creates a poll on Twitter and invites residents to share how they feel about the new tax. About \( 70 \% \) of responses oppose the new tax. Which of these is the best explanation for why this result is probably biased?

An equilateral triangle has sides of length 15 cm , correct to the nearest centimetre. Calculate the upper bound of the perimeter of this triangle.

2. Determine the actual distance represented by the following lengths on a scale diagram using a \( 1: 50 \) scale. a) 1.5 cm b) 4 cm c) 7 cm d) 12.5 cm

Exercice 11: L'objectif de cet exercice est l'étude de la suite \( \left(u_{n}\right) \) définie pour tout entier \( n \) par : \[ \left\{\begin{array}{c}u_{0}=3 \\ u_{n+1}=\frac{4 u_{n}-2}{u_{n}+1}\end{array}\right. \] 1. Etudier les variations de la fonction \( f \) définie sur \( ] 1 ;+\infty\left[\right. \) par \( f(x)=\frac{4 x-2}{x+1} \) 2. Démontrer par récurrence que pour tout entier naturel \( n, u_{n}>2 \) 3. Etudier le sens de variation de la suite. 4. Montrer que pour tout entier naturel \( n, u_{n+1}-2=\frac{2}{u_{n}+1}\left(u_{n}-2\right) \). En déduire que pour tout entier naturel \( n, u_{n+1}-2<\frac{2}{3}\left(u_{n}-2\right) \) 5. Démontrer par récurrence que pour tout entier naturel \( n, 0 \leq u_{n}-2 \leq\left(\frac{2}{3}\right)^{n} \) 6. En déduire la limite éventuelle de la suite.

Erika becomes upset when her father leaves. When her father is present, Erika approaches, follows, and climbs on him in preference to others. Erika is most likely ir Bowlby's phase. a. "clear-cut" attachment b. preattachment c. "attachment-in-the-making" d. formation of a reciprocal relationship

Following conception, the one-celled ___ multiplies and forms a(n) a. zygote; blastocyst b. embryo; fetus c. blastocyst; embryo d. blastocyst; zygote