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andrew-mc [135]
3 years ago
7

Help meeeeeeeeeee I need help please please please please please please please please please please please

Mathematics
1 answer:
Kamila [148]3 years ago
6 0
Its 1 = 5 im pretty sure
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Circle P has a circumference of approximately 75 inches. Circle P with radius r is shown. What is the approximate length of the
Komok [63]

Answer:

12 inches, I hope this is right! :)

Step-by-step explanation:

circumference = 75 inches

75 / 2 = 35.7

37.5 / π = 11.9366207

Rounded to the nearest inch:

12 inches

8 0
3 years ago
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You measure 22 textbooks' weights, and find they have a mean weight of 64 ounces. Assume the population standard deviation is 5.
lara31 [8.8K]

Answer:

Step-by-step explanation:

We want to determine a 90% confidence interval for the true population mean textbook weight.

Number of sample, n = 22

Mean, u = 64 ounces

Standard deviation, s = 5.1 ounces

For a confidence level of 90%, the corresponding z value is 1.645. This is determined from the normal distribution table.

We will apply the formula

Confidence interval

= mean ± z ×standard deviation/√n

It becomes

64 ± 1.645 × 5.1/√22

= 64 ± 1.645 × 1.087

= 64 ± 1.788

The lower end of the confidence interval is 64 - 1.788 = 62.21 ounces

The upper end of the confidence interval is 64 + 1.788 = 65.79 ounces

Therefore, with 90% confidence interval, the true population mean textbook weight is between 62.21 ounces and 65.79 ounces

3 0
3 years ago
Represent 8 as an expression.
klio [65]

Answer:

x + 8

Step-by-step explanation:

4 0
3 years ago
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What is the substitution for 3x+4y^2 if x= -2 and y=3?
Hitman42 [59]

Answer:

30

Step-by-step explanation:

x= -2 and y= 3

Hence, simply put it in the equation:

3x + 4y^2

3(-2) + 4(3)^2

-6 + 4(9)

-6 + 36

30

Hope this helps!

If you find this helpful, please mark brainliest! Would really appreciate!

8 0
3 years ago
An angle that is less than 180 degrees is acute. Always Sometimes Never
gizmo_the_mogwai [7]

Answer:

Sometimes

Step-by-step explanation:

An acute angle is an angle that measures less than 90°

So, an angle that is less than 180° is sometimes acute.

5 0
3 years ago
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