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Serjik [45]
3 years ago
7

A woman starts out walking due north for 2 miles, and then she turns due west and continues for another 2 miles. How far from he

r starting point is she?
Mathematics
1 answer:
Svet_ta [14]3 years ago
4 0
2.8284271247 miles i used the pythagorean theorem to get the answer
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9.4 The heights of a random sample of 50 college stu- dents showed a mean of 174.5 centimeters and a stan- dard deviation of 6.9
gladu [14]

Answer:  a) (176.76,172.24), b) 0.976.

Step-by-step explanation:

Since we have given that

Mean height  = 174.5 cm

Standard deviation = 6.9 cm

n = 50

we need to find the 98% confidence interval.

So, z = 2.326

(a) Construct a 98% confidence interval for the mean height of all college students.

x\pm z\times \dfrac{\sigma}{\sqrt{n}}\\\\=(174.5\pm 2.326\times \dfrac{6.9}{\sqrt{50}})\\\\=(174.5+2.26,174.5-2.26)\\\\=(176.76,172.24)

(b) What can we assert with 98% confidence about the possible size of our error if we estimate the mean height of all college students to be 174.5 centime- ters?

Error would be

\dfrac{\sigma}{\sqrt{n}}\\\\=\dfrac{6.9}{\sqrt{50}}\\\\=0.976

Hence, a) (176.76,172.24), b) 0.976.

8 0
3 years ago
an item is regularly priced $70. it is now priced at a discount of 20% off the regular price. what is the price now?
AVprozaik [17]
The price now is (80/100)x70 = (5600/100) = $56;
8 0
3 years ago
Hi so i need help with 10 and 12 ASAP is due 11:40 I’m giving away all my points thx
blsea [12.9K]

Hi.

First, I am going to give you some definitions.This will help you do the problems.

-Complementary angles have a combined sum of 90.

- Supplementary angles have a combined sum of 180.

10. 40+50=90- so YES.

12. 159+20= 179.-so NO.

Make sure you learn the definitions properly next time!

=)

7 0
3 years ago
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What is the x intercept of this linear function. y=2x-3​
Allisa [31]

Answer:

set y = 0 to get the x intercept,,,,,,,,,,   0 = 2x -3 =    x = 3/2 or 1.5

Step-by-step explanation:

6 0
3 years ago
PLEASE HELP! WILL MARK BRAINLIEST ANSWER!
lubasha [3.4K]

Answer:

5

Step-by-step explanation:

the median means the number in the middle so the number in the middle would be 5

8 0
3 years ago
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