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
allsm [11]
3 years ago
15

vinny invested $25,000 in an account that earns 4.25% simple interest. if vinny doesn't make any additional deposits or withdraw

als, how much interest will he have earned after 9 years?
Mathematics
1 answer:
dimulka [17.4K]3 years ago
4 0
He will have $34,562.50 in his account after 9 years.
You might be interested in
Find the median, mean, and range.
MissTica

Hey there!!

The median is 72

The mean is 69

The range is 42

Hope this helps you!

God bless ❤️

xXxGolferGirlxXx

3 0
3 years ago
Read 2 more answers
4. Trace metals in drinking water affect the flavor, and unusually high concentrations can be haz-
tresset_1 [31]

Answer:

There isn't enough evidence to suggest that the true average concentration in the surface water is different than the concentration in the bottom water.

Step-by-step explanation:

We want to test if the true average concentration in the surface water is different than the concentration in the bottom water.

For this, we obtain a new distribution that is the difference between zinc concentration at the bottom and at the top for the 6 samples

A B C D E F

Zinc on surface

0.411 0.238 0.390 0.410 0.605 0.609

Zinc on bottom

0.430 0.266 0.369 0.531 0.627 0.716

Difference (zinc at bottom - zinc at surface)

0.019 0.028 -0.021 0.121 0.022 0.107

We can the find the mean of the differences and the standard deviation of the sample of differences

Mean = xbar = (Σx)/N = (0.276/6) = 0.046

Standard deviation = σ = √{[Σ(x - xbar)²]/(N-1)}

We use (N - 1) because this distribution is that of a sample.

x = each variable

xbar = mean = 0.046

N = number of variables = 6

σ = 0.055612948132607 = 0.055613

For hypothesis testing, the first thing to define is the null and alternative hypothesis.

The null hypothesis plays the devil's advocate and usually takes the form of the opposite of the theory to be tested. It usually contains the signs =, ≤ and ≥ depending on the directions of the test.

While, the alternative hypothesis usually confirms the the theory being tested by the experimental setup. It usually contains the signs ≠, < and > depending on the directions of the test.

For this question, we want to test if the true average concentration in the surface water is different than the concentration in the bottom water.

Hence, the null hypothesis is that there isn't significant evidence to suggest that the true average concentration in the surface water is different than the concentration in the bottom water.

The alternative hypothesis is that there is significant evidence to suggest that the true average concentration in the surface water is different than the concentration in the bottom water.

Mathematically, if the mean of zinc concentration at the surface and the bottom are μ₁ and μ₂ respectively and the mean difference is μ = μ₂ - μ₁

The null hypothesis is represented as

H₀: μ = 0 or μ₂ = μ₁

The alternative hypothesis is represented as

Hₐ: μ ≠ 0 or μ₂ ≠ μ₁

To do this test, we will use the t-distribution because no information on the population standard deviation is known

So, we compute the t-test statistic

t = (x - μ₀)/σₓ

x = mean difference = 0.046

μ₀ = 0

σₓ = standard error = (σ/√n)

σ = 0.055613

n = Sample size = 6

σₓ = (0.055613/√6) = 0.0227

t = (0.046 - 0) ÷ 0.0227

t = 2.026 = 2.03

checking the tables for the p-value of this t-statistic

Degree of freedom = df = n - 1 = 6 - 1 = 5

Significance level = 0.05

The hypothesis test uses a two-tailed condition because we're testing in both directions.

p-value (for t = 2.03, at 0.05 significance level, df = 5, with a two tailed condition) = 0.098613

The interpretation of p-values is that

When the (p-value > significance level), we fail to reject the null hypothesis and when the (p-value < significance level), we reject the null hypothesis and accept the alternative hypothesis.

So, for this question, significance level = 0.05

p-value = 0.098613

0.098613 > 0.05

Hence,

p-value > significance level

This means that we fail to reject the null hypothesis & say that there isn't enough evidence to suggest that the true average concentration in the surface water is different than the concentration in the bottom water.

Hope this Helps!!!

5 0
3 years ago
Here are the images:
nataly862011 [7]

Answer:

the anwer is D: all of the above

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Pounds gained by people in your class during the first month of the semester on example of which type of data? 1. Qualitative
Orlov [11]

Answer:

quantitative

Step-by-step explanation:

Weight is a continuous variable, and so the numbers of pounds gained by people in your class is quantitative.

3 0
3 years ago
What would be the answer to round off to nearest thousands of 0.8677​
IrinaVladis [17]

Answer:

0.868

Step-by-step explanation:

To round to the nearest thousandths place, end your decimal 3 places to the right of the decimal.

0.8677

To end the decimal look the the decimal place directly to the right of the thousandths which is 7. Since it is greater than 5 you round 7 to 8.

The rounded number is 0.868.

6 0
2 years ago
Read 2 more answers
Other questions:
  • What is the answer to 4.55÷5
    5·2 answers
  • a square is put together by two triangles. the hypotenuse is 11 cm and width if 8 cm. find the height of the triangle.
    6·1 answer
  • HELP NEED THIS ASAP!!!
    14·2 answers
  • If it’s too blurry let me know. I’ve been plugging in these points and idk maybe I’m doing something wrong but o can’t get the l
    13·1 answer
  • Which of the following figures has a length, width, and a height
    12·2 answers
  • Secx-1/secx=sinxtanx
    14·1 answer
  • Which statement best describes what happened when h is changed from 4 to - 2.
    9·1 answer
  • The price of a visit to the dentist is $50 . If the dentist fills any cavities, an additional charge of, 100$ per cavity gets ad
    10·2 answers
  • What is 3/8 of $36.48​
    8·1 answer
  • Can someone help me. <br><br><br> Which equation represents the data in the table?
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!