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
prisoha [69]
3 years ago
7

Sydney saved $3,000 last year. She saved $600 in the month of January. What percent of the total amount of money she saved last

year did Sydney save in the month of January
Mathematics
1 answer:
const2013 [10]3 years ago
8 0

Answer:

20%

Step-by-step explanation:

all you do in this is divide the smaller nymber by the bigger number:

600/3000

You might be interested in
sam divided a rectangle into 8 congruent rectangles that each have a area of 5 cm2. what is the area of the rectangle before it
Vikki [24]
Congruent= the same shape and size.

area of the rectangle before it is divided=8*(area congruent rectangle)
area of the rectangle before it is dividide=8*(5 cm²)=40 cm²

Area of the rectangle before it is dividide=40 cm²
5 0
3 years ago
Write an equation in point-slope form that passes through ( -4, 2) and has a slope of 3. *
hram777 [196]
Option 2 i believe .
7 0
3 years ago
(I need someone to answer fast please and a clear answer too so ill mark them as brainlyest) :)
AVprozaik [17]

Answer: 12.6 m

Step-by-step explanation:

Use the pythagorean theorem, we get that the height, or x, is

sqrt(22x22-18x18) = sqrt(484-324) = sqrt(160) = 4sqrt(10) = 12.6 m

4 0
2 years ago
Read 2 more answers
7 students have 8 books each. Which helps you find the total number of books?
bija089 [108]

Answer:

7 × 8

Step-by-step explanation:

7 number of students × 8 books each student has 7 × 8 = 56

5 0
2 years ago
Two opposing opinions were shown to a random sample of 1,500 buyers of a particular political news app in the United States. The
kifflom [539]

Answer:

A) 98% Confidence interval for the proportion of all US buyers of this particular app who would have chosen Opinion B

= (0.51, 0.57)

This means that the true proportion of all thay would chose opinion B can take on values between the range of (0.51, 0.57)

B) For the confidence interval obtained to be valid, the conditions stated must be satisfied and for the sampling distribution to be approximately normal, the number of buyers that chose Opinion B and the number of buyers that did not choose Opinion B must both be greater than 10.

Step-by-step explanation:

Confidence Interval for the population proportion is basically an interval of range of values where the true population proportion can be found with a certain level of confidence.

Mathematically,

Confidence Interval = (Sample proportion) ± (Margin of error)

Sample proportion of all US buyers of this particular app who would have chosen Opinion B = 0.54

Margin of Error is the width of the confidence interval about the mean.

It is given mathematically as,

Margin of Error = (Critical value) × (standard Error)

Critical value at 98% confidence interval for sample size of 1500 is obtained from the z-tables.

Critical value = 2.33

Standard error = σₓ = √[p(1-p)/n]

p = sample proportion = 0.54

n = sample size = 1500

σₓ = √(0.54×0.46/1500) = 0.0128685664 = 0.01287

98% Confidence Interval = (Sample proportion) ± [(Critical value) × (standard Error)]

CI = 0.54 ± (2.33 × 0.01287)

CI = 0.54 ± 0.02998)

98% CI = (0.51, 0.57)

98% Confidence interval = (0.51, 0.57)

B) The number of buyers that chose Opinion B and the number of buyers that did not choose Opinion B are both greater than 10. Why must this inference condition be met?

For this confidence interval to be obtained using sample data, a couple of conditions are necessary to be satisfied. They include;

- The sample data must have been obtained using a random sampling technique.

- The sampling distribution must be normal or approximately normal.

- The variables of the sample data must be independent of each other.

On the second point, the condition for a binomial distribution to approximate a normal distribution is that

np ≥ 10

and n(1-p) ≥ 10

The quantity np is the actual sample mean which is the actual number of buyers that chose Opinion B while n(1-p) is the number of buyers that did not chose Opinion B.

For the confidence interval obtained to be valid, the conditions stated must be satisfied and for the sampling distribution to be approximately normal, the number of buyers that chose Opinion B and the number of buyers that did not choose Opinion B must both be greater than 10.

Hope this Helps!!!

8 0
3 years ago
Other questions:
  • a factory can assemble 3400 ipods in an 8 hour shift. how long would it take to assemble 100000 pods?
    11·2 answers
  • Given that S is the centroid of triangle MNO, find SQ. A. 4. B. 5. C. 10. D. 15
    11·2 answers
  • Help please
    10·1 answer
  • Given an actual demand of 59, a previous forecast of 64, and an alpha of .3, what would the forecast for the next period be usin
    13·1 answer
  • The sum of one-third of a number and 10 is equal to 13. What is the number?
    12·1 answer
  • What is 10+10 hmmmmmmmm
    14·1 answer
  • £50 is divided between Krutika, Natasha & Richard so that Krutika gets twice as much as Natasha, and Natasha gets three time
    11·2 answers
  • Need help due in 10 mins
    10·1 answer
  • What is the volume of the following rectangular prism?
    14·1 answer
  • What is -2(x+1) simplified
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!