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3 years ago

What is the best approximation for the perimeter of a semicircle with a diameter of 12 cm?

2 answers:

7 0

First, we know that the equation for permeter of a circle is C=2*pi*4 or C=2*3.14*r if you are using 3.14 for pi. Since this is a semicircle, we simply divide this equation by 2 and plug in our radius (radius id 6 because 12/2 =6)

So we are using C=3.14*r
C=3.14*6
So the perimeter equals 18.84 so A

Hope this helps!

DedPeter [7]3 years ago

3 0

To find the circumference of a circle, we use this formula: C = (2)(pi)(r)

We'll use 3.14 for pi. And the radius is one half of a diameter.

C = (2)(3.14)(6) = 37.68

Then because we want the perimeter of a semi-circle, we half it.
37.68 / 2 = 18.84

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The number y of hits a new website receives each month can be modeled by y = 4070ekt, where t represents the number of months th

makvit [3.9K]

Answer:

k = 0.2645

Step-by-step explanation:

Given model:

y = 4070 $e^{kt}$

y = no. of hits website received = 9000 (in 3rd month)

t= no. of months website has been operational = 3

put in the above equation:

9000 = 4070 $e^{3k}$

$\frac{9000}{4070}$ = $e^{3k}$

$\frac{900}{407}$ = $e^{3k}$

Taking natural logarithm on both sides, we get:

$ln\frac{900}{407}$ = $ln(e^{3k})$

$ln\frac{900}{407}$ = 3k lne

lne=1

$ln \frac{900}{407}$ = 3k

or k = $\frac{1}{3}$ $ln\frac{900}{(407)}$

k = $\frac{1}{3}$ (0.7936)

k = 0.2645

7 0

3 years ago

In their first year, The Princess Bride earned $342,600,000 while Double-Take earned $670,900,000. What were their total earning

motikmotik

Answer:

1013500000

Step-by-step explanation:

Addition, mate.

8 0

3 years ago

What is the inverse of the function f(x) = x +3?

vladimir1956 [14]

The inverse of the function f(x)= x+3 would be x-3.

5 0

3 years ago

Find m < 4 and m < 3

Angelina_Jolie [31]

Inside of the triangle must = 180. Let angle '4' = x. x + 45 + 47 = 180. Combine like terms, x + 92 = 180. Subtract 92 on both sides, x = 88.

Now angle '4' and angle '3' must equal 180 because they are on the same plane. Let angle '3' = y. y + 88 = 180. Subtract 88 on both sides, y = 92.

So Angle 4 is 88 degrees and Angle 3 is 92 degrees.

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3 years ago

66 is 11% of what number?

8_murik_8 [283]

66 / 0.11 = 600 Therefore, 66 is 11 percent of 600.

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3 years ago