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3 years ago

What’s the area of an circle with the diameter 14cm

Mathematics

2 answers:

ryzh [129]3 years ago

3 0

153.86 is the answer because the formula is Pi times radius squared. So, the equation would be 3.14X7^2=3.14X49=153.86

Artemon [7]3 years ago

3 0

153.93cm2 is what I got for my answer

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There are 8 chairs arranged evenly around t tables. Write an expression that shows how many chairs are at each table.

Leno4ka [110]

The correct expression is 8/t

8 0

2 years ago

Read 2 more answers

A rettangle is 10 inches smaller than it is wide. The perimeter of the

meriva

Answer:

A. Width = 25 Length = 15

Step-by-step explanation:

Length = L = Width - 10

Width = W

Perimeter of a rectangle

=> 2 (L + B) = 80

=> 2 (W - 10 + W) = 80

=> 2 (2W - 10) = 80

=> 4W -20 = 80

=> 4W -20 + 20 = 80 + 20

=> 4W = 100

=> 4W/4 = 100/4

=> W = 25

Width = 25

Length = 25 - 10 = 15

So, the answer is A.

6 0

3 years ago

Plz help me, thank you

Kruka [31]

Answer:

$P=40(1.03526)^{t}$

Step-by-step explanation:

<u>Exponential Growth </u>

The natural growth of some magnitudes can be modeled by the equation:

$P=P_o(1+r)^{t}$

Where P is the actual amount of the magnitude, Po is its initial amount, r is the growth rate and t is the time.

The initial number of bacteria is Po=40 and it doubles (P=2Po) at t=20 min. With that point we can find the value of r:

$2P_o=P_o(1+r)^{20}$

Simplifying:

$(1+r)^{20}=2$

Solving for 1+r:

$1+r=\sqrt[20]{2}$

$1+r=1.03526$

The exponential function that models the situation is:

$\mathbf{P=40(1.03526)^{t}}$

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2 years ago

In the following equation, a and b are both integers.<br><br> a(3x-8)=b -18x

almond37 [142]

A = -6
b = 48
Hope this helps :)

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3 years ago

If f(x) = 3x - 1 and g(x) = x + 2, find (f+g)(x).

yawa3891 [41]

F+g(x) = f(x) + g(x) = 3x-1 + x+2 = 4x+1

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3 years ago