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
Andru [333]
2 years ago
7

PLEASS HELP!!

Mathematics
1 answer:
Vinvika [58]2 years ago
5 0

Answer:

The answer is B

Step-by-step explanation:

By proportion , 3 : 2.91 = 2: x . then you write it in fraction

You might be interested in
An initial investment of $100,000 at 12% interest is compounded weekly (use 52 weeks in a year). What will the investment be wor
ozzi

Answer:

$3644675.9

Step-by-step explanation:

The initial investment is $100000. The interest rate is 12%.  

We are asked to determine the final amount the investment will become after 30 years if the interest is compounded weekly.

The weekly interest rate is \frac{12}{52} = 0.231%.

Assuming 1 year equivalent to 52 weeks.

Hence, using the formula of compound interest the final sum will be  

100000(1 + \frac{0.231}{100} )^{(30 \times 52)}

= $3644675.9 (Approximate)

8 0
3 years ago
Problem 2: For a recent year, the mean fare to fly from Charlotte, North Carolina to Chicago Illinois, on a discount ticket was
Maru [420]

Answer:

Step-by-step explanation:

n = 12

The mean of the set of data given is

Mean, x = (286 + 290 + 285 + 291 + 287 + 275 + 262 + 289 + 274 + 276 + 297 + 262)/12 = 281.2

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

Summation(x - mean)² = (286 - 281.2)^2 + (290 - 281.2)^2 + (285 - 281.2)^2 + (291 - 281.2)^2 + (287 - 281.2)^2 + (275 - 281.2)^2 + (262 - 281.2)^2 + (289 - 281.2)^2 + (274 - 281.2)^2 + (276 - 281.2)^2 + (297 - 281.2)^2 + (262 - 281.2)^2 = 1409.68

Standard deviation, s = √(1409.68/12) = 10.8

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

1) For the null hypothesis,

H0: µ = 290

For the alternative hypothesis,

H1: µ < 290

This is a left tailed test.

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

Since n = 12,

Degrees of freedom, df = n - 1 = 12 - 1 = 11

t = (x - µ)/(s/√n)

Where

x = sample mean = 281.2

µ = population mean = 290

s = samples standard deviation = 10.8

t = (281.2 - 290)/(10.8/√12) = - 2.82

Test statistic = - 2.82

3) The decision rule is to reject the null hypothesis if the significance level is greater than the p value.

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

p value = 0.0083

5) Since alpha, 0.01 > than the p value, 0.0083, then we would reject the null hypothesis. Therefore, At a 1% level of significance, the sample data showed significant evidence that the mean fare has decreased.

3 0
3 years ago
A die is rolled twice. what is the probability of getting either a multiple of 3 on the first roll or a total of 7 for both roll
never [62]
P(multiple of 3) = 2/6 = 1/3
P(total of 7) = 6/36 = 1/6
1/3 + 1/6 = 1/2

Hopefully this helped.
3 0
3 years ago
A grandson's age in months is equal to his grandfather's age in years. The difference
Debora [2.8K]

The difference of the grandson's age in years and the grandfather's age in years is 77. Therefore, the age of the grandson is 7 years.

<h3>How to use equations to find the age?</h3>

A grandson's age in months is equal to his grandfather's age in years.

Recall,

12 months = 1 year

Hence,

let

x = age of grandson in month

It is the same age in years for the grandfather.

Therefore,

x = age of grand father in years

The difference of the grandson's age in years and the grandfather's age in years is 77. Therefore,

x - x / 12 = 77

12x - x/12 = 77

11x / 12 = 77

cross multiply

11x = 924

x = 924 / 11

x = 84

Therefore, the grandson age in in years is 84 / 12 = 7 years.

learn more on equation here: brainly.com/question/11136531

#SPJ1

6 0
2 years ago
Which ratio is the simplest form of 42:28 ?
Shkiper50 [21]

Answer:

3 :2

Step-by-step explanation:

hope this helps

3 0
3 years ago
Read 2 more answers
Other questions:
  • What is the quotient (2x3 − 15x2 − 10x + 16) ÷ (x − 8)?
    6·1 answer
  • When planning his crops, Farmer Tim knows that his 7 acres can support peas and carrots. He wants to make $7,000 from his crops.
    6·2 answers
  • Simplify: -1-(-10x-10)​
    11·1 answer
  • The employees of a hardware store ordered lunch from a local delicatessen. The lunch consisted of 4 turkey sandwiches and 7 orde
    6·1 answer
  • I need help. Someone help please. (photo)​
    14·1 answer
  • What's smaller than 1/4
    13·2 answers
  • Chan rows at a rate of 8 mph in still water. It takes him three hours to row upstream from his house to the park. He rows back h
    5·1 answer
  • Draw a square that is not a quadrilateral
    11·1 answer
  • A triangle and a trapezoid are graphed on the coordinate plane shown below.
    11·1 answer
  • The cost of a barrel of beans, b, fluctuates by 17% in both directions during a three-month period. Match each verbal descriptio
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!