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2 years ago

A circle has a radius of 16 m. What is its circumference?

Mathematics

1 answer:

suter [353]2 years ago

4 0

Answer:

C=100.53 CM²

Step-by-step explanation:

Formula to the circumference of a circle is 2π·r

2π=6.28

6.28·16=100.53 CM²

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Find a line that is parallel to y=-2x+7 and passes through a point of (1,-1)

navik [9.2K]

Answer:

y=-2x +1

Step-by-step explanation:

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2 years ago

Solve the system of equations. 3x+4y=−23 x=3y+1 x= y=

Romashka-Z-Leto [24]

Answer:

i think {x,y} = {-5,-2}

Step-by-step explanation:

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2 years ago

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Janice had $125. She loved earrings so much that she spent $7.00 every week to buy a new pair. How much money will she have left

olga55 [171]

Answer:

she will have $90 left after 5 weeks

Step-by-step explanation:

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3 years ago

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A manufacturer of chocolate chips would like to know whether its bag filling machine works correctly at the 450 gram setting. It

Arturiano [62]

Answer:

Test statistic = -2.25

P-value = 0.0199

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 450 gram

Sample mean, $\bar{x}$ = 441 grams

Sample size, n = 16

Alpha, α = 0.05

Sample variance = 256

$\sigma^2 = 256\\\sigma = \sqrt{256} = 16$

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 450\text{ grams}\\H_A: \mu < 450\text{ grams}$

We use one-tailed t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

Putting all the values, we have

$t_{stat} = \displaystyle\frac{441 - 450}{\frac{16}{\sqrt{16}} } = -2.25$

Now,

Degree of freedom =

$=n-1 = 16-1=15$

We can calculate the p-value from the table as:

P-value = 0.0199

Conclusion:

Since the p-value is smaller than the significance level we fail to accept the null hypothesis and reject it.

Thus, there is enough evidence to support the claim that the machine is under filling the bags .

5 0

3 years ago

Please answer correctly !!!!!!!!!!!!!!!!!!!!! Will mark brainliest !!!!!!!!!!!!!!!!!!!

Over [174]

Answer:

n = 11

General Formulas and Concepts:

Order of Operations: BPEMDAS
Equality Properties
Vertical Angles: Angles that are across from each other and are congruent

Step-by-step explanation:

Step 1: Set up equation

Vertical angles must be congruent.

(6n - 4)° = (5n + 7)°

Step 2: Solve for n

Subtract 5n on both sides: n - 4 = 7
Add 4 to both sides: n = 11

8 0

3 years ago