A production manager at a wall clock company wants to test their new wall clocks. The designer claims they have a mean life of 16 years with a variance of 16. If the claim is true, in a sample of 48 wall clocks, what is the probability that the mean clock life would be greater than 15.3 years? Round your answer to four decimal places.

15. Evaluate the following expression \[ \frac{\left|x^{3}-4 y\right|+z}{2 x}-5 y \]

Let abcd be a general four-digit number and all the digits are non-zero. How many four-digits numbers abcd exist such that the four digits are all distinct and such that \( a+b+c=d \) ?

\( CuO + C \rightarrow Cu + CO _ { 2 } \)

EXERCICES DU ler TRIMESTRE 2024-2025 FORMES GEOMETRIQUES 1) Quel est le périmètre d'un rectangle dont la largeur est le \( \frac{1}{3} \) de la longueur si celle-ci est de 27 cm ? Solution

3. \( \quad 5^{1}+\left(-\frac{1}{4}\right)^{0}-0^{5} \) işleminin sonucunu bulunuz.