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Zielflug [23.3K]
3 years ago
8

In a random sample of 28 sports cars, the average annual fuel cost was $2929 and a sample standard division $786. Construct a 90

% confidence interval for the population mean. Assume the annual fuel cost are normally distributed

Mathematics
1 answer:
Aneli [31]3 years ago
7 0

Answer:

The answer is provided at the attachment

Step-by-step explanation:

The answer is provided at the attachment

Hope this helps

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A person breathes 2.5 x 10^-4 in about cubic meters of air per second. How long does it take to breathe in 2.5 cubic meters of a
Ipatiy [6.2K]

Answer:

10⁴ seconds

Step-by-step explanation:

Given that,

A person breathes 2.5\times 10^{-4} in about cubic meters of air per second.

We need to find time taken to breathe 2.5 cubic meters of air.

In 1 sec = 2.5\times 10^{-4} m³ of air breathe

Let in x seconds, 2.5 m³ of air taken by the person.

x=\dfrac{2.5}{2.5\times 10^{-4}}\\\\x=10^4\ s

Hence, in 10⁴ seconds 2.5 m³ of air is taken by the person.

5 0
2 years ago
5 times 2/12=___ 4 times 2/3=___ 6 times 2/6=___ 2 times 4/8=___ 3 times 1/2=____
uysha [10]

Answer:

1) .8333 2) 2.6666 3) 2 4) 1.5

Step-by-step explanation:

I just used a calculator.

3 0
3 years ago
Read 2 more answers
I need help ASAP you must drag each of those tiles and match them up to the photos
iren2701 [21]

Answer:

Step-by-step explanation:

how we supposed to do it , when we cant control it

3 0
3 years ago
What's the probability of pulling two red cards in a row from a deck of cards?​
monitta

Hey there! I'm happy to help!

Let's say that we don't have jokers. In that case, there are 52 cards, and half of them are red (so 26 are red). The probability of pulling a red card once is 1/2 since half the cards are red.

If we pick one out, there are only 51 total cards left and 25 red cards. So, the probability of picking one again would be 25/51.

We multiply the probabilities of these two events to find the probability of them both happening.

1/2×25/51=25/102

The probability of picking two red cards in a row is 25/102 or around 24.5%.

Have a wonderful day! :D

8 0
2 years ago
What is the measure, in degree, of angle z ?
Jobisdone [24]

Answer:

55°

Step-by-step explanation:

if the middle is straight, then x+35°=90°

7 0
2 years ago
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