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Dmitry [639]
3 years ago
12

F(x) = 20 - x What is the y intercept

Mathematics
1 answer:
erma4kov [3.2K]3 years ago
7 0

Answer: The y intercepts are: ( 0, 20 )

Step-by-step explanation:

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A random sample of 101 lightning flashes in a certain region resulted in a sample average radar echo duration of 0.81 sec and a
Masteriza [31]

Answer:

The 99% (two-sided) confidence interval for the true average echo duration μ is between 0 sec and 1.99 sec.

Step-by-step explanation:

We have the sample standard deviation, so we use the student t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 101 - 1 = 100

99% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 100 degrees of freedom(y-axis) and a confidence level of [tex]1 - \frac{1 - 0.99}{2} = 0.995. So we have T = 2.6259

The margin of error is:

M = T*s = 2.6259*0.45 = 1.18

In which s is the standard deviation of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 0.81 - 1.18. Answer in seconds cannot be negative, so we use 0 sec.

The upper end of the interval is the sample mean added to M. So it is 0.81 + 1.18 = 1.99 sec

The 99% (two-sided) confidence interval for the true average echo duration μ is between 0 sec and 1.99 sec.

6 0
3 years ago
If Seth traveled 1 mile in 57.1 seconds. About how fast does Seth travel in miles per hour?
irga5000 [103]

Answer: Seth is travelling at 63.047mi/hr

Step-by-step explanation: First convert 57.1 seconds to hours.

1 hour is equal to 3600s so multiply 57.1sec by 1hr/3600s to get 0.0158 hr

The formula for speed distance over time. v=d/t

v= 1mi/0.0158hr

v= 63.047mi/hr

8 0
4 years ago
Read 2 more answers
Plzzz help me!!
bija089 [108]
The answer is 20 cm 3
3 0
4 years ago
55.27 is the same as 55 ____' 12".
ziro4ka [17]

<span>0.27 * 60 = Take the integer part only to get the minutes, then multiply the decimal part by 60 again to get the second</span>
6 0
4 years ago
Malik collects rare stamps and has a total of 212 stamps. He has 34 more domestic stamps than foreign stamps. Let x represent th
cluponka [151]

Answer:

  • foreign: 89
  • domestic: 123

Step-by-step explanation:

Add the two equations together:

  (x -y) +(x +y) = (34) +(212)

  2x = 246

  x = 123

  y = x-34 = 89

Malik has 89 foreign stamps and 123 domestic stamps.

4 0
4 years ago
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