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timurjin [86]
3 years ago
11

HELP ASAP GIVING BRAINLIEST LETS GO! In a dark hallway, you have a hard time finding your way to the bathroom. To find the bathr

oom, you try the following:
Shouting for help
Feeling your way down the hall
Turning on a lamp
Crawling along the floor
----------------------------------------------------------------------------------------------------------------------------
.All four are successful, but only one of these options uses two forms of energy. Identify the two forms of energy for that option.(2 points)
A.Electrical and light
B.Heat and sound
C.Mechanical and light
D.Sound and heat
Mathematics
1 answer:
larisa86 [58]3 years ago
4 0
Answer
mechanical and light
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According to a recent study of 7335 young people in the US, 30% had been arrested for a crime other than a traffic violation by
victus00 [196]

Answer:

a) Statistic.

b) The population proportion is expected to be between 0.29 and 0.31 with a 94% degree of confidence.

Step-by-step explanation:

a) The proportion of 30% is a statistic, as it is a value that summarizes data only from the sample taken in the study from USA Today. Other samples may yield different proportions.

b) We can use the statistic to estimate a confidence interval for the parameter of the population.

The standard error for the proportion is calculated as:

\sigma_p=\sqrt{\dfrac{p(1-p)}{N}}=\sqrt{\dfrac{0.3\cdot 0.7}{7335}}=\sqrt{2.83\cdot10^5}= 0.00535

The margin of error is 0.01. We can use this value to determine the level of confidence that represents.

The formula for the margin of error is:

E=z\cdot \sigma_p=0.01\\\\z\cdot 0.0535=0.01\\\\z=1.87

This z-value, according to the the standard normal distribution, corresponds to a confidence interval of 94%.

The interval for this margin of error is:

p-E\leq \pi \leq p+E\\\\0.30-0.01\leq \pi \leq 0.30+0.01\\\\0.29\leq \pi \leq 0.31

Then, we can conclude that the population proportion is expected to be between 0.29 and 0.31 with a 94% degree of confidence.

3 0
4 years ago
at 7:00 am the temperature in wilton was -6 degrees. by 8:00 am the temperature was 2 degrees. what is the difference in the tem
lawyer [7]

Answer:

Step-by-step explanation:

at 7 the temperature=-6

at 8 the temperature=2

difference=8 degree

8 0
4 years ago
Read 2 more answers
I need help i will give 15 points and a Brainliest if its right
d1i1m1o1n [39]
A is the answer to the question
8 0
3 years ago
Adam buys a car for £18680 which depreciates in value at a rate of 2.5% per year. Work out how much Adam's car will be worth in
timofeeve [1]

Answer:

Adam's car will be 8,406£ in 22 years.

Step-by-step explanation:

I. Find the lose value of 2.5% car by

2.5/100 = x/18,680

46,700/100 = x

x = 467 or the lose value in 1st year.

II. Find the true value of Adam's car by

n year = 18,680 - 467(n)

1st = 18,680 - 467(1)

    = 18,213 means if he sell his car now, he'll get 18,213£

22th = 18,680 - 467(22)

        = 18,680 - 10,274

        = 8,406£

That makes 8,406£ is the right answer.

Hope that help :)

4 0
3 years ago
You need to buy the supplies to carpet a 15 foot by 14 foot room. The padding costs 0.89 per square foot and the carpeting costs
Troyanec [42]
Area of the room =  14*15 = 210 ft^2
Cost padding = 210*89 =   186.90
Cost of carpet =   210 * 2.99 = 627.90
Perimeter of the room = 2*15 + 2*14 =  58 ft
Cost of strip = 58*0.19 =  11.02

Total cost of supplies = 186.90 + 627.90 + 11.02  =   825.82  Answer
6 0
3 years ago
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