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3 years ago

What is the circumference of a circle that has a diameter of 9 in?

Mathematics

2 answers:

postnew [5]3 years ago

8 0

Answer:

The circumference is 28.27in.

liq [111]3 years ago

3 0

The circumference of the circle is 28.26 in.

Step-by-step explanation:

Given,

The diameter of a circle = 9 in

Radius of the circle (r) = 4.5 in

To find the circumference of the circle.

Formula

The circumference of the circle of radius r = 2πr

Now,

The circumference of the circle = 2×3.14×4.5 in [ taking π = 3.14]

= 28.26 in

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Solve. <br> X^2+5x-10=0 <br> Enter your answers, as exact values, in the boxes.

Grace [21]

Answer:

$x^{2} + 5x - 10 = 0 \\x^{2} + 5x = 10 \\ x(x + 5) = 10$

Now,

Either,

x=10

Or,

x+5=10

x=10-5

x=5

3 0

3 years ago

Management at a seaside resort is publishing a brochure and wants to include a statement about the proportion of clear days duri

Ymorist [56]

Answer: B. 264

Step-by-step explanation:

Formula to calculate the sample size 'n' , if the prior estimate of the population proportion (p) is available:

$n= p(1-p)(\dfrac{z}{E})^2$

, where z = Critical z-value corresponds to the given confidence interval

E= margin of error

Let p be the population proportion of clear days.

As per given , we have

Prior sample size : n= 150

Number of clear days in that sample = 117

Prior estimate of the population proportion of clear days = $p=\dfrac{117}{150}$

E= 0.05

The critical z-value corresponding to 95% confidence interval = z*= 1.95 (By z-table)

Then, the required sample size will be :

$n= \dfrac{117}{150}(1-\dfrac{117}{150})(\dfrac{1.96}{0.05})^2$

Simplify ,

$n= (0.1716)(39.2)^2$

$n= 263.687424\approx264$

Hence, the sample size necessary to construct this interval =264

Thus the correct option is B. 264

7 0

3 years ago

Which equation requires the multiplication property of equality to be solved?

alexira [117]

Option 1: 6a = 420 requires division property of equality to be solved
Step-by-step explanation:
Solving an equation means to find the value of a variable by isolating the variable on one side of the equation.
We will see all the options one by one.
Option 1:

In this option, 6 is multiplied with the variable so we have to divide the whole equation by 6 to find the value of a.
So we will use "Division property of Equality"
Dividing both sides by 6

pls help me get Brainlyest

6 0

3 years ago

Read 2 more answers

Identify the zeros of the quadratic function.

cluponka [151]

Is there a b ok but it’s A

4 0

3 years ago

what expression represents the following problem: A glass holds 1/ 4 liters of liquid. How many glasses of liquid are in 5 liter

maxonik [38]

20... 5÷ 1/4 $20/ \frac{1}{4}$

3 0

3 years ago