A rational number is a number that can be expressed as the quotient or fraction p/q of two integers, a numerator p and a non-zero denominator q. Since q may be equal to 1, every integer is a rational number.
Answer:
13 driveways with a quarter of an hour to spare
Step-by-step explanation:
Complete Question
A civil engineer is analyzing the compressive strength of concrete. Compressive strength is normally distributed with
. A random sample of 12 sample specimens has a mean compressive strength of 
. Round your answers to 1 decimal place. (a) Calculate the 95% two-sided confidence interval on the true mean compressive strength of concrete.
Answer:
Step-by-step explanation:
From the question we are told that:
Sample size 
Standard deviation 
Sample mean 
Confidence level =95%
significance level
From table \alpha 0.05
Gives
Generally the equation for confidence interval is mathematically given by
Answer:
z = 106°
As a straight line has total 180°
Find the top inside angle:
t + 142° = 180°
t = 180° - 142°
t = 38°
Two opposite angles sum up to exterior angle.
<u>Now find z:</u>
68° + 38°
106°
This equation is written in slope- intercept form, or y=mx+b.
In slope intercept form, “b” is the y intercept.
Since -5 is in the place of b, -5 is the y intercept.
Hope this helps!
