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
nadezda [96]
3 years ago
9

HELP ASAP 10 POINTS TO BRAINLIEST

Mathematics
1 answer:
enyata [817]3 years ago
6 0

Answer:

60%

Step-by-step explanation:

100%-20%=80%. 25% of 80% is 60%. So the answer is 60%.

You might be interested in
If in two circles, arcs of the same length subtend angles 60° and 75° at the centre, find the ratio of their radii.
Westkost [7]

➳ ye lo isse jyada clear answer nahi de sakti

3 0
3 years ago
Read 2 more answers
SOMEONE HELP ASAP WITH THIS QUESTION HELPPPPPPP<br><br> TYSM!!!!
Gnesinka [82]

Answer:

a = 3cm , h = 6cm

A = a^2 + 2a\sqrt{\frac{a^2}{4} h^2} = 46.11cm^2

6 0
3 years ago
HELPPP!!!
lozanna [386]

25.5

Step-by-step explanation:

The way to do this is:

80 * 3.14 equals to roughly 25.5

4 0
3 years ago
-57 = -6(4 + 5x) - 3 *
marin [14]
The correct answer is X=1
8 0
3 years ago
Read 2 more answers
A researcher was interested in comparing the resting pulse rates of people who exercise regularly and people who do not exercise
DiKsa [7]

Answer:

We Reject H₀ if t calculated > t tabulated

But in this case,

0.83 is not greater than 2.056

Therefore, we failed to reject H₀

There is no difference between the mean pulse rate of people who do not exercise and the mean pulse rate of people who do exercise.

Step-by-step explanation:

Refer to the attached data.

The Null and Alternate hypothesis is given by

Null hypotheses = H₀: μ₁ = μ₂

Alternate hypotheses = H₁: μ₁ ≠ μ₂

The test statistic is given by

$ t = \frac{\bar{x}_1  - \bar{x}_2}{\sqrt{\frac{s_1^2}{n_1} + \frac{s_2^2}{n_2} } }  $

Where \bar{x}_1 is the sample mean of people who do not exercise regularly.

Where \bar{x}_2 is the sample mean of people who do exercise regularly.

Where s_1 is the sample standard deviation of people who do not exercise regularly.

Where s_2 is the sample standard deviation of people who do exercise regularly.

Where n_1 is the sample size of people who do not exercise regularly.

Where n_2 is the sample size of people who do exercise regularly.

$ t = \frac{72.7  - 69.7}{\sqrt{\frac{10.9^2}{16} + \frac{8.2^2}{12} } }  $

t = 0.83

The given level of significance is

1 - 0.95 = 0.05

The degree of freedom is

df = 16 + 12 - 2 = 26

From the t-table, df = 26 and significance level 0.05,

t = 2.056 (two-tailed)

Conclusion:

We Reject H₀ if t calculated > t tabulated

But in this case,

0.83 is not greater than 2.056

Therefore, We failed to reject H₀

There is no difference between the mean pulse rate of people who do not exercise and the mean pulse rate of people who do exercise.

4 0
3 years ago
Other questions:
  • William Sydney Porter tried to perform the calculation <img src="https://tex.z-dn.net/?f=%5Cfrac%7B-3%2B4i%7D%7B1%2B2i%7D" id="T
    8·1 answer
  • Convert 3.0x10^10 cm/s to ft/s
    5·1 answer
  • Which number belongs as the question mark?
    7·1 answer
  • In a class of 40 students, everyone has either a pierced nose or a pierced ear. The professor asks everyone with a pierced nose
    8·1 answer
  • I need help with this!!!!
    12·2 answers
  • What is the equation for -2 = m divided by 16
    8·1 answer
  • (Geometry Question) <br> For Tangent A, would it be 1.05 or 0.9524?
    10·2 answers
  • This week Zara earned AED 25 less than twice the amount she earned last week, x.She earned AED 2875 this week. How much did she
    11·1 answer
  • Really stupid question, but how do you add a comment lol. There’s no enter button or anything (I’m on an iPad) if that helps.
    15·2 answers
  • During the summer, Cecile read twice as many books as Kami. Laura read three times as
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!