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3 years ago

13

Please give answer and explain please.

2 answers:

Ahat [919]3 years ago

6 0

The diagram shows you the radius of the circle is 1. It also tells you the value to use for π is 3. After you put these values in the formula, the rest is just arithmetic.
.. C = 2*π*r
.. C = 2*3*1
.. C = 6

DENIUS [597]3 years ago

3 0

Circumference is the roundabout measure of a circle. To find this, you need to use the equation listed in the bottom right-hand corner. R is your given radius (1) and instead of using the usual estimated number value for pi (3.14) you will use 3.

Multiply 2(1)(3) = 6

6 is the value of your circumference.

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Everett and marie are going to make fruit bars for their family reunion. THey want to make 4 times the amount the recipe makes.

puteri [66]

Answer:

Step-by-step explanation:

2 2/3

4 0

3 years ago

Find the focus of the parabola whose equation is y=1/8 x^2

Mama L [17]

Answer:

The focus is: $(0,2)$

Step-by-step explanation:

Given

$y = \frac{1}{8}x^2$

Required

Determine the focus

The focus of a parabola

$(x- h)^2 = 4p(y - k)$

is:

$(h,k+p)$

So, we have:

$y = \frac{1}{8}x^2$

Cross multiply

$8y = x^2$

Rewrite as:

$x^2 = 8y$

Rewrite as:

$(x - 0)^2 = 8(y - 0)$

Express 8 as 4 * 2

$(x - 0)^2 = 4 * 2(y - 0)$

By comparison with: $(x- h)^2 = 4p(y - k)$

$h = 0$ $p =2$ $k = 0$

So, the focus $(h,k+p)$ is:

$(h,k+p) = (0,0+2)$

$(h,k+p) = (0,2)$

7 0

3 years ago

Help with this please?....:)<br>

marusya05 [52]

Answer:

200. 96 cm^2

Step-by-step explanation:

If the area of a circle is $\pi$ $r^{2}$

$\pi$ = 3.14,

radius = 8 cm (r = diameter/2 ----> r = 16/2)

= $\pi$ $r^{2}$

$= 3.14 (8^{2})\\= 200. 96 cm^{2}$

7 0

3 years ago

The amount of time a certain brand of light bulb lasts is normally distributed with a

scoundrel [369]

Answer:

92.65 % light bulbs last less than 2080 hours

Step-by-step explanation:

We are given that The amount of time a certain brand of light bulb lasts is normally distributed

Mean = $\mu = 2000$

Standard deviation = $\sigma = 55$

We are supposed to find What percentage light bulbs last less than 2080 hours, to the nearest tenth

$Z = \frac{x-\mu}{\sigma}\\\\Z=\frac{2080-2000}{55}$

Z=1.45

Refer the z table for p value

p value = 0.9265

Hence 92.65 % light bulbs last less than 2080 hours

5 0

3 years ago

If f of x equals 3x plus 2, find f of 4

Juli2301 [7.4K]

Answer:

f(4) = 14

Step-by-step explanation:

f(x) = 3x+2

Let x=4

f(4) = 3(4)+2

= 12+2

= 14

4 0

3 years ago