Which of the following equations has an extraneous root?<br><br>

Solve -37+n=-56 for n

azamat

Answer:

n=-19

Step-by-step explanation:

-37+n=-56

-37+37+n=-56+37

n=-19

7 0

2 years ago

The concentration of carbon monoxide (CO) in a gas sample is measured by a spectrophotometer and found to be 85 ppm. Through lon

alukav5142 [94]

Answer:

The confidence interval is $(85 - \frac{14.81}{\sqrt{n}},85 + \frac{14.81}{\sqrt{n}})$ , in which n is the size of the sample.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.95}{2} = 0.025$

Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.025 = 0.975$ , so Z = 1.96.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 1.645\frac{9}{\sqrt{n}} = \frac{14.81}{\sqrt{n}}$

The lower end of the interval is the sample mean subtracted by M. So it is $85 - \frac{14.81}{\sqrt{n}}$

The upper end of the interval is the sample mean added to M. So it is $85 + \frac{14.81}{\sqrt{n}}$

The confidence interval is $(85 - \frac{14.81}{\sqrt{n}},85 + \frac{14.81}{\sqrt{n}})$ , in which n is the size of the sample.

4 0

3 years ago

Wendy's restaurant has been recognized for having the fastest average service time among fast food restaurants. In a benchmark s

VikaD [51]

Answer:

(a) 0.2885

(b) 0.0736

(c) 0.0468

Step-by-step explanation:

The exponential distribution of Wendy's service time is given by:

P(x) = [exp (-x/μ)]/μ............................................................................ (1)

P(x) = Probability function

x = Service time, in minute

μ = average service team, in minute, 2.2 minutes

(a) x= 1, substituting into equation (1) we have:

P(1) = [exp (-1/2.2)]/2.2

= 0.6347/2.2

= 0.2885

(b) x₁ = 0.5 minutes

x₂ = 1 minute

P (0.5<x<1) = P(0.5) -P(1) ----------------------------------------------- (2)

From (a), P (1) = 0.2885

P(0.5) =P(1) = [exp (-0.5/2.2)]/2.2

= 0.7967/2.2

= 0.3621

Substituting into (2), we have :

P (0.5<x<1) = 0.3621 -0.2885

= 0.0736

(c) P(5) = [exp (-5/2.2)]/2.2

= 0.1030/2.2

= 0.0468

7 0

3 years ago

Alex has five cups of strawberries. He wants to use 1 cups of strawberries for a fruit salad and 3 cups for jam. Does Alex have

Marrrta [24]

Answer:

Yes

Step-by-step explanation:

5 is the amount he has he uses 1 on the salad and 3 on jam and 1+3=4

so he has 1 more cup leftover.

4 0

3 years ago

Make a sum of a whole number and a number less than 1.

Savatey [412]

4/5 or something else that is a fraction

A Fraction is less than 1

8 0

3 years ago

Read 2 more answers

Which of the following equations has an extraneous root?​

Which of the following equations has an extraneous root?