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
DaniilM [7]
3 years ago
13

(-2.8)^6 (Round to three decimal places as needed)

Mathematics
2 answers:
vladimir2022 [97]3 years ago
7 0
-2.8 • -2.8 • -2.8 • -2.8 • -2.8 • -2.8
=481.890
Darya [45]3 years ago
4 0

Answer:

481.890

Step-by-step explanation:

481.890304 rounded to the nearest hundredth will be 481.890

You might be interested in
Researchers fed mice a specific amount of Dieldrin, a poisonous pesticide, and studied their nervous systems to find out why Die
Elodia [21]

Answer:

Step-by-step explanation:

Part A

Mean = (2.2 + 2.4 + 2.5 + 2.5 + 2.6 + 2.7)/6 = 2.48

Standard deviation = √(summation(x - mean)²/n

n = 6

Summation(x - mean)² = (2.2 - 2.48)^2 + (2.4 - 2.48)^2 + (2.5 - 2.48)^2 + (2.5 - 2.48)^2 + (2.6 - 2.48)^2 + (2.7 - 2.48)^2 = 0.1484

Standard deviation = √(0.1484/6

s = 0.16

Standard error = s/√n = 0.16/√6 = 0.065

Part B

Confidence interval is written as sample mean ± margin of error

Margin of error = z × s/√n

Since sample size is small and population standard deviation is unknown, z for 98% confidence level would be the t score from the student t distribution table. Degree of freedom = n - 1 = 6 - 1 = 5

Therefore, z = 3.365

Margin of error = 3.365 × 0.16/√6 = 0.22

Confidence interval is 2.48 ± 0.22

Part C

We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean

For the null hypothesis,

H0: µ = 2.3

For the alternative hypothesis,

H1: µ > 2.3

This is a right tailed test

Since the number of samples is small and no population standard deviation is given, the distribution is a student's t.

Since n = 6

Degrees of freedom, df = n - 1 = 6 - 1 = 5

t = (x - µ)/(s/√n)

Where

x = sample mean = 2.48

µ = population mean = 2.3

s = samples standard deviation = 0.16

t = (2.48 - 2.3)/(0.16/√6) = 2.76

We would determine the p value using the t test calculator. It becomes

p = 0.02

Assuming significance level, alpha = 0.05.

Since alpha, 0.05 > than the p value, 0.02, then we would reject the null hypothesis. Therefore, At a 5% level of significance, the sample data showed significant evidence that the mean absolute refractory period for all mice when subjected to the same treatment increased.

6 0
3 years ago
When truckers are on long-haul drives, their driving logs must reflect their average speed. Average speed is the total distance
KengaRu [80]

Answer:

0.500 hour

Step-by-step explanation:

Givens

<em><u>Distance</u></em>

  • Total Distance on the highway = 3hr * 60 miles / hr = 180 miles
  • Distance in the city = 20 miles
  • Total Distance = 180 + 20 = 200 miles

<em><u>Time</u></em>

  • Time on the highway = 3 hours
  • Time in the city = x

Formula

d /t = r

Solution

  • Average rate = 57.14
  • Total Distance / Total Time = average rate
  • 200 / (3 + x) = 57.14                               Multiply both sides by 3 + x
  • 200 = 57.14 * (3 + x)                               Remove the brackets
  • 200 = 57.14*3 + 57.14x                           Multiply the factors on the right
  • 200 = 171.42 + 57.14x                              Subtract 171.42 from both sides.
  • 200 - 171.42 = 171.42 - 171.42 + 57.14x   So the subtraction
  • 28.58 = 57.14x                                         Divide by 57.14
  • 28.57/57.14 = x
  • x = 0.500 hour                                        Answer


3 0
3 years ago
Read 2 more answers
Help me please I put 50 points idk how much it actually gives
tatuchka [14]

You weren't clear on instructions

7 0
3 years ago
Read 2 more answers
2m = 1 + m what do I need to do to solve this problem
Anvisha [2.4K]

First you have to subtract the m on the right from the left so it would just end up being m = 1

Hope this helps

-Ayden

8 0
2 years ago
Read 2 more answers
Mimi feeds her dog 7.5 lbs of food in a week. She feeds her cat 3.75 lbs of food in a week. How many total lbs of food do her pe
algol [13]
Both of her pets eat 11.25lbs of food in a week
6 0
3 years ago
Read 2 more answers
Other questions:
  • Lin is tracking the growth of her plant. today the plant is 5 cm high. the plant grows 1.5 cm per day. write an equation that re
    5·1 answer
  • A rectangle is drawn with perimeter 75 cm. The length is 13 more than the width. What is the length?
    11·2 answers
  • H(x)=-5x^2+10x+15h(x)=−5x 2 +10x+15h, left parenthesis, x, right parenthesis, equals, minus, 5, x, squared, plus, 10, x, plus, 1
    8·1 answer
  • A chef makes 3 containers of soup that fill a total 120 soup bowls. Each container of soup costs $30 to make. What is the cost p
    5·2 answers
  • What is the surface area of this rectangular prism?
    15·1 answer
  • The following dot plots describe the test scores on Mr. Santos final exam.
    13·1 answer
  • Consider the line - 4x – 3y = 5.
    5·1 answer
  • What is 21 divided by 756?
    7·2 answers
  • A 6-pack of light bulbs costs $7.38. What is the unit price?
    13·1 answer
  • What is the value of y in the equation 2(2y - 12) = 0?<br> 04<br> 06<br> 07<br> 08
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!