All categories

3 years ago

Help me please please please

Mathematics

1 answer:

8090 [49]3 years ago

4 0

Answer:

-She subtracted the end time from the start time

-She did not regroup 1 hour for 60 minutes to subtract the minutes

-She did not account for am and pm in the start and end times

You might be interested in

Suppose researchers are concerned about the rate of residents reporting no access to health insurance in a particular community.

o-na [289]

Answer:

a) The expected number of households that will have no insurance is 2.4.

b) The standard deviation is 1.3505.

Step-by-step explanation:

For each resident, there are only two possible outcomes. Either they have health insurance, of they do not. This means that we can solve this problem using concepts of the binomial probability distribution.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

The expected number of successes is given by:

$E(X) = np$

The standard deviation is given by:

$\sqrt{Var(X)} = \sqrt{np(1-p)}$

In this problem, we have that:

A group of 10 households, so $n = 10$ .

24% of residents are living without health insurance, so $p = 0.24$ .

a. What is the expected number of households that will have no insurance?

$E(X) = np = 10*0.24 = 2.4$

The expected number of households that will have no insurance is 2.4.

b. What is the standard deviation?

$\sqrt{Var(X)} = \sqrt{np(1-p} = \sqrt{10*0.24*0.76} = 1.3505$

The standard deviation is 1.3505.

4 0

4 years ago

If the cost price of an article is less than selling price true or false

lawyer [7]

Step-by-step explanation:

If the cost price of an article is less than selling price then there will be loss.

Loss=Cost Price - Selling Price

5 0

3 years ago

The tax rate is 7.25%. A set of golf clubs costs $200.<br> What is the total price, including tax?

snow_tiger [21]

B.207.25 is the answer

3 0

3 years ago

Read 2 more answers

Two years ago Carol's living expenses were $ 1200 $ 1200 per month. This year the same items cost Carol $ 1400 $ 1400 per month.

EleoNora [17]

Given:
2 years ago - consumer price index 1,200 per month
current year - consumer price index 1,400 per month

Inflation rate = [(Consumer price index current - Consumer price index previous) / Consumer price index previous ] * 100%

Inflation rate = [(1400 - 1200) / 1200] * 100% = (200 / 1200) * 100% = 16.67%

Since 2 years has passed, the 16.67% inflation rate is good for 2 years. We simply divide the inflation rate by 2 to get the annual inflation rate.

16.66% / 2 = 8.33%

The annual inflation rate for the past two years is 8.33%

8 0

3 years ago

Read 2 more answers

if employees who make more money pay a higher percentage of their income to the government, this is known as what?

True [87]

Answer;

-Progressive tax

Explanation;

-According to this type of tax system, the taxes assessed are based on the taxable amount, and follow an increasing schedule. High-income earners pay more than low-income earners, and the tax rate, along with tax liability, increases as an individual or entity's wealth increases.

-Therefore; higher earners pay a higher percentage of taxes and more money in taxes than do lower-income earners .

7 0

3 years ago

Read 2 more answers