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3 years ago

Which of these can be a result of inflation?

1 answer:

6 0

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
Among the choices the one that can be a result of inflation is The price of household items increases

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A train travels from station A to station B. If the train leaves station A and makes 75 km/hr, it arrives at station B 48 minute

SSSSS [86.1K]

Answer:

A) 290 km
B) 4 hours
C) 72.5 km/h

Step-by-step explanation:

Let distance be d and time t

At 75 km/h speed the distance is

d = 75(t - 48 min) = 75(t - 48/60 hours)

At 50 km/h speed the distance is

d = 50t + 40

Since the distance is same, we get the equation:

75(t - 48/60) = 50t + 40
75t - 75*4/5 = 50t + 40
75t - 60 = 50t + 40
75t - 50t = 40 + 60
25t = 100
t = 4 hours

A) The distance between A and B

d = 50*5 + 40 = 290 km

B) Time is

4 hours as found above

C) The speed = d/t

Speed = 290/4 = 72.5 km/h

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3 years ago

Can someone help me with this question please?

Naya [18.7K]

Bro that stuff is really hard is this rocket science

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4 years ago

A _____________ places points on the opposite side like a mirrored image.

olya-2409 [2.1K]

The answer is C reflection

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3 years ago

Read 2 more answers

A box of 15 cookies costs $9. MY What is the cost for 1 cookie?

Nitella [24]

Answer: $0.6

Step-by-step explanation:

15cookies= $9

1 cookie = x

Cross multiply

15x= 9

Divide both sides by 15

x= 9/15= 3/5= $0.6

4 0

3 years ago

Read 2 more answers

Two different simple random samples are drawn from two different populations. The first sample consists of 30 people with 16 hav

Furkat [3]

Answer:

There is no significant evidence that p1 is different than p2 at 0.01 significance level.

99% confidence interval for p1-p2 is -0.171 ±0.237 that is (−0.408, 0.066)

Step-by-step explanation:

Let p1 be the proportion of the common attribute in population1

And p2 be the proportion of the same common attribute in population2

$H_{0}$ : p1-p2=0

$H_{a}$ : p1-p2≠0

Test statistic can be found using the equation:

$z=\frac{p2-p1}{\sqrt{{p*(1-p)*(\frac{1}{n1} +\frac{1}{n2}) }}}$ where

p1 is the sample proportion of the common attribute in population1 ( $\frac{16}{30} =0.533$ )

p2 is the sample proportion of the common attribute in population2 ( $\frac{1337}{1900} =0.704$ )

p is the pool proportion of p1 and p2 ( $\frac{16+1337}{30+1900}=0.701$ )

n1 is the sample size of the people from population1 (30)

n2 is the sample size of the people from population2 (1900)

Then $z=\frac{0.704-0.533}{\sqrt{{0.701*0.299*(\frac{1}{30} +\frac{1}{1900}) }}}$ ≈ 2.03

p-value of the test statistic is 0.042>0.01, therefore we fail to reject the null hypothesis. There is no significant evidence that p1 is different than p2.

99% confidence interval estimate for p1-p2 can be calculated using the equation

p1-p2± $z*\sqrt{\frac{p1*(1-p1)}{n1}+\frac{p2*(1-p2)}{n2}}$ where

z is the z-statistic for the 99% confidence (2.58)

Thus 99% confidence interval is

0.533-0.704± $2.58*\sqrt{\frac{0.533*0.467}{30}+\frac{0.704*0.296}{1900}}$ ≈ -0.171 ±0.237 that is (−0.408, 0.066)

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3 years ago