Answer:
Step 1: x^2 + 8x + 15 + 1 = 0 + 1
Step 2: x^2 + 8x + 16 = 1
Step 3: (x + 4)^2 = 1
Step-by-step explanation:
You want the constant on the left to be the square of half the x-coefficient.
(8/2)^2 = 4^2 = 16
You already have a constant that is 15, so you need to add 1 to both sides of the equation. That is the <em>Step 1</em> shown here. <em>Step 2</em> is simplifying the result of <em>Step 1</em>. <em>Step 3</em> is rewriting the trinomial as the square of a binomial.
So base in your given that the function P(-d<z<d)=0.5408, the ask is to find the value of D by standard normal distribution. Base on my calculation and analyzing the equation the possible answer to this question is D=0.2704, i hope you are satisfied with my answer and feel free to ask for more
To find how much they earned in one hour you need to 62/4= 15.5 which means they earned 15.5 an hour. Next do 15.5*6=93. Finally 155/15.5=10