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pogonyaev
3 years ago
15

Idk my little sister asked me this question but idk how to answer it

Mathematics
2 answers:
Masteriza [31]3 years ago
8 0
3 mins 35 seconds yuuh
PtichkaEL [24]3 years ago
4 0

Answer:

B

Step-by-step explanation:

There are three sets of 60s (3minutes) and if you add 60+60+60 you get 180. Then you take 215-180 and get 35. So 3 minutes and 35 seconds

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The distribution of the number of occurrences of the letter t on the pages of a book is found to be a normal distribution with a
Leno4ka [110]
The distribution of the number of occurrences of the letter t on the pages of a book is found to be a normal distribution with a mean of 44 and a standard deviation of 18. If there are 500 pages in the book, which sentence most closely summarizes the data?

A. The letter t occurs less than 26 times on approximately 170 of these pages. 

B. The letter t occurs less than 26 times on approximately 15 of these pages. 

C. The letter t occurs more than 26 times on approximately 420 of these pages. 

D. The letter t occurs more than 26 times on approximately 80 of these pages.

.Answer: 
<span>mean = 44 </span>
<span>sd = 18 </span>
<span>that means that "26" is 1 s.d. down, or at the 16th %ile </span>


<span>so, there is a .16 chance that "t" will occur less than 26 times on any single page. </span>
<span>consequently, there is a .84 chance that it will occur more than 26 times on any single page. </span>

<span>Using that information, and knowing that 16% of 500 is 80, and 84% of 500 is 420, can you see where "C" is correct? </span>
4 0
3 years ago
Read 2 more answers
Please help me ASAP..
Triss [41]

Answer:

x = -8

Step-by-step explanation:

5(x - 1) = -45

5x - 5 = -45

add 5 to each side of the equation:

5x = -40

divide both sides by 5:

x = -8

8 0
3 years ago
Mhanifa please answer this question about lines
ratelena [41]
I think the answer is TR
3 0
2 years ago
The video states that 78% of people carry less than $50 in cash; 40% carry less than $20 in cash, and 9% carry no cash. Suppose
Inessa05 [86]

Answer:

The probability that 12 people in your sample are carrying no cash is 0.0712

Step-by-step explanation:

n = 100

p(no cash) = 0.09

x = 12

By applying binomial distribution

P(x,n) = nCx*px*(1-p)(n-x)

P(x = 12) = 0.074.

The probability that 12 people in your sample are carrying no cash is 0.074.

n = 100

p(less than 50) = 0.78

x = 75

By applying binomial distribution

P(x,n) = nCx*px*(1-p)(n-x)

P(x = 75) = 0.0712

The probability that 12 people in your sample are carrying no cash is 0.0712

6 0
3 years ago
Find the diameter and circumference of a circle with the radius of 13.1 km.
Alexandra [31]
R = 13.1
so
<span>diameter  = 13.1 x 2 = 26.2 km
</span>circumference = 2 pi r = 26.2 pi km
or
circumference = 26.2 x 3.14 = 82.27 km
4 0
2 years ago
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