Use the following information to calculate a z-score. LaTeX: \mu\:=\:500μ = 500 LaTeX: \sigma\:=\:100σ = 100 LaTeX: x\:=\:475x = 475 Which of the following options is LaTeX: P\left(x\le475\right)P ( x ≤ 475 )?

z-score = -0.25

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 500

Standard Deviation, σ = 100

Formula:

We have to evaluare

:

Calculation the value from standard normal z table, we have,  

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is: