1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
abruzzese [7]
3 years ago
7

Please do first question AND HURRY.

Mathematics
1 answer:
sweet-ann [11.9K]3 years ago
5 0
The picture is cut off. We can't solve :/
You might be interested in
Which statement is true?
SVEN [57.7K]

Answer:

y=log_{1} x is not a logarithmic function because the base is equal to 1.

Step-by-step explanation:

A logarithmic function is of the form: y=log_{b}x

For a logarithmic function to exist, we must fulfill certain conditions. The conditions are

i. The base, b, is greater than 0. {b>0)

ii. The base, b, is not equal to 1. (b\ne 1)

iii. x must be greater than 0. (x>0)

Now, if we observe all the choices given, we conclude that the third choice is correct as the base there is 1. If base is equal to 1, then it violates the definition of logarithmic functions. So, the correct choice is:

y=log_{1} x is not a logarithmic function because the base is equal to 1.

6 0
3 years ago
Read 2 more answers
5) In a certain supermarket, a sample of 60 customers who used a self-service checkout lane averaged 5.2 minutes of checkout tim
Ne4ueva [31]

Answer:

\S^2_p =\frac{(60-1)(3.1)^2 +(72 -1)(2.8)^2}{60 +72 -2}=8.643

S_p=2.940

t=\frac{(5.2 -6.1)-(0)}{2.940\sqrt{\frac{1}{60}+\frac{1}{72}}}=-1.751

df=60+72-2=130

p_v =P(t_{130}

Assuming a significance level of \alpha=0.05 we have that the p value is lower than this significance level so then we can conclude that the mean for checkout time is significantly less for people who use the self-service lane

Step-by-step explanation:

Data given

Our notation on this case :

n_1 =60 represent the sample size for people who used a self service

n_2 =72 represent the sample size for people who used a cashier

\bar X_1 =5.2 represent the sample mean for people who used a self service

\bar X_2 =6.1 represent the sample mean people who used a cashier

s_1=3.1 represent the sample standard deviation for people who used a self service

s_2=2.8 represent the sample standard deviation for people who used a cashier

Assumptions

When we have two independent samples from two normal distributions with equal variances we are assuming that  

\sigma^2_1 =\sigma^2_2 =\sigma^2

The statistic is given by:

t=\frac{(\bar X_1 -\bar X_2)-(\mu_{1}-\mu_2)}{S_p\sqrt{\frac{1}{n_1}+\frac{1}{n_2}}}

And t follows a t distribution with n_1+n_2 -2 degrees of freedom and the pooled variance S^2_p is given by this formula:

\S^2_p =\frac{(n_1-1)S^2_1 +(n_2 -1)S^2_2}{n_1 +n_2 -2}

System of hypothesis

Null hypothesis: \mu_1 \geq \mu_2

Alternative hypothesis: \mu_1 < \mu_2

This system is equivalent to:

Null hypothesis: \mu_1 - \mu_2 \geq 0

Alternative hypothesis: \mu_1 -\mu_2 < 0

We can find the pooled variance:

\S^2_p =\frac{(60-1)(3.1)^2 +(72 -1)(2.8)^2}{60 +72 -2}=8.643

And the deviation would be just the square root of the variance:

S_p=2.940

The statistic is given by:

t=\frac{(5.2 -6.1)-(0)}{2.940\sqrt{\frac{1}{60}+\frac{1}{72}}}=-1.751

The degrees of freedom are given by:

df=60+72-2=130

And now we can calculate the p value with:

p_v =P(t_{130}

Assuming a significance level of \alpha=0.05 we have that the p value is lower than this significance level so then we can conclude that the mean for checkout time is significantly less for people who use the self-service lane

5 0
3 years ago
Please help on timerr
rewona [7]

the answer would be -6

3 0
2 years ago
What is the value of the blue dot
Gre4nikov [31]

Answer:

there doesnt seem to be much information, but from what it looks like it looks like it is 20?

4 0
3 years ago
Read 2 more answers
Write the equation of a quadratic function in standard form for the parabola that passes through the given points.
vazorg [7]

Answer:

5,7 given point its korrect now

8 0
1 year ago
Other questions:
  • In a class of 147 students, 95 are taking math(m), 75 are taking science (s), 52 are taking both math and science. What is the p
    14·1 answer
  • In our solar system, 6 of the 8 planets have moons. What percentage of the planets have moons?
    14·1 answer
  • What vocabulary term means 1 of 1,000 equal parts of a whole
    10·1 answer
  • A baker uses 6.5 pounds of sugar daily. How many ounces of sugar will he use in 3 weeks? Use words or numbers to explain your th
    9·1 answer
  • What is the measure of DBE?
    5·1 answer
  • PLEASE SOLVE FOR BOTH THE STARS AND SQUARES! BRAINLIEST AND 5 STARS! URGENT
    12·2 answers
  • Sarah rides her bike three days a week. She rides for 10 minutes a day. How many minutes does Sarah spend riding her bike after
    9·2 answers
  • Heey someone plz help me quick! thx :))
    10·2 answers
  • Help me im so sad determine the values of X for which f(x) is defined ​
    5·1 answer
  • Just answer these 4questions! (: 13 points!
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!