Step-by-step explanation:
The plumber's daily earnings have a mean of $145 per day with a standard deviation of
$16.50.
We want to find the probability that the plumber earns between $135 and
$175 on a given day, if the daily earnings follow a normal distribution.
That is we want to find P(135 <X<175).
Let us convert to z-scores using

This means that:

We simplify to get:

From the standard n normal distribution table,
P(z<1.82)=0.9656
P(z<-0.61)=0.2709
To find the area between the two z-scores, we subtract to obtain:
P(-0.61<z<1.82)=0.9656-0.2709=0.6947
This means that:

The correct choice is C.
Answer:
Therefore the Perimeter of the room is 94 ft.
Step-by-step explanation:
Given:

Where ,
P = Perimeter
l = Length = 26 ft
w = Width = 21 ft
To Find:
Perimeter of the room = ?
Solution:
Perimeter of Rectangle is given as

Substituting 'l' and 'w' we get


Therefore the Perimeter of the room is 94 ft.
Answer:

Step-by-step explanation:

Answer:
In order to get this perfect square trinomial, the factored form will be (a - b)^2
Step-by-step explanation:
We know this because it follows the rule of perfect squares in which the ends are both squares and the middle term is -2 times each term.