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
lesya692 [45]
2 years ago
13

Pls help :((((((((((((((((((

Mathematics
2 answers:
Veseljchak [2.6K]2 years ago
8 0
I think the answer is 49.3
monitta2 years ago
3 0
The answer would be 49.3
You might be interested in
C=K(Rr/R-r) solve for R<br><br> Pweese help.
Monica [59]

Answer:

hjv

Step-by-step explanation:

jvfkydf.;jurdfrtkuo7g

5 0
3 years ago
the cost of running an appliance varies jointly as the number of watts used, the hours of operation, and the cost per kilo-watt
zhuklara [117]
Suppose:
C=cost
c=cost per kilo-watt hour
w=number of watts
h=number of hours
thus
C=kwhc
where:
k=constant of proportionality:
k=C/(whc)
but
C=15 when w=6000, h=10/60=1/6 hours, c=7.5 cents per kw/h
thus
k=15/(6000*1/6*7.5)
k=0.002
thus:
C=0.002(whc)
hence:
when 
h=70*2=140=140/6=70/3 hours the cost will be:
C=0.002(6000*70/3*7.5)
C=2100 cents
C=$21

7 0
3 years ago
What defines a line segment
Stolb23 [73]
A line segment is defined as the set of numbers that is contained in a line between the two endpoints.
4 0
3 years ago
Read 2 more answers
Oranges sell for $5.00 per bag. If there are 10 oranges in each bag, how much is the price per orange?
yulyashka [42]

Answer:

The answer is A

Step-by-step explanation:

10 divided by 5

8 0
3 years ago
Read 2 more answers
If a test of H subscript 0 colon space mu subscript D equals 0 space v s. space H subscript a colon space space mu subscript D g
lara [203]

Answer:

p_v =P(t_{(n-1)}>t_{calculated}) =0.0601

The p value on this case is given  by the problem.

If we compare the p value with a significance level assumed \alpha=0.05, we see that p_v > \alpha and we can conclude that we FAIL to reject the null hypothesis that the difference mean between after and before is less or equal than 0.

Step-by-step explanation:

A paired t-test is used to compare two population means where you have two samples in  which observations in one sample can be paired with observations in the other sample. For example  if we have Before-and-after observations (This problem) we can use it.  

Let put some notation  

x=test value before , y = test value after

The system of hypothesis for this case are:

Null hypothesis: \mu_y- \mu_x \leq 0

Alternative hypothesis: \mu_y -\mu_x >0

The first step is calculate the difference d_i=y_i-x_i

The second step is calculate the mean difference  

\bar d= \frac{\sum_{i=1}^n d_i}{n}

The third step would be calculate the standard deviation for the differences, and we got:

s_d =\frac{\sum_{i=1}^n (d_i -\bar d)^2}{n-1}

The 4 step is calculate the statistic given by :

t=\frac{\bar d -0}{\frac{s_d}{\sqrt{n}}}=t_{calculated}

The next step is calculate the degrees of freedom given by:

df=n-1

Now we can calculate the p value, since we have a right tailed test the p value is given by:

p_v =P(t_{(n-1)}>t_{calculated}) =0.0601

The p value on this case is given  by the problem.

If we compare the p value with a significance level assumed \alpha=0.05, we see that p_v > \alpha and we can conclude that we FAIL to reject the null hypothesis that the difference mean between after and before is less or equal than 0.

4 0
3 years ago
Other questions:
  • Simplify the following expression.
    5·1 answer
  • Identify which of the statements is true. −36.5 &gt; −36.07 −2.6 &gt; 2.521 −8.0329 &gt; −8.045 −0.4 &gt; −0.004
    12·1 answer
  • A cotton candy vendor has 27 cones of blue cotton candy to sell. If the blue cotton candy is 75% of the total number of cones, h
    15·1 answer
  • The graph shown is a scatterplot which point on the scatterplot is an outliner??Help
    7·2 answers
  • Which number is a solution of the inequality 8 – 14b ≥ 27?
    5·2 answers
  • What are two values for x?|x|=5
    9·2 answers
  • To solve a system of equations, you can replace a ____________with an equal value or expression.
    6·1 answer
  • You are dealt two cards successively without replacement from a standard deck of 52 playing cards. Find the probability that the
    15·1 answer
  • On a day in the month of February the temperature in barrow Alaska is 221*f at the same time the temperature in northway Alaska
    14·1 answer
  • Which expressions are equal to ? Check all that apply.
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!