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Tamiku [17]
3 years ago
9

Bacteria live in groups called colonies colonies are usually circular the diameter distance across if a particular bacterial col

ony is 8mm to call circumference of a circle is equal to Pi 3.14 times its diameter C equals Pi D what is the circumference of the colony
Mathematics
1 answer:
Basile [38]3 years ago
4 0
The circumference is 3.14 times the diameter or 3.14 x d since d is 8 the equation becomes 3.14 x 8 = 25.12 mm in circumference. 
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I’m not sure how to slove this problem it’s a equilateral triangle and I’m trying to find out what the side is equal to.
Tamiku [17]

Answer as a fraction: AB = 127/13 (exact)

Answer in decimal form: AB = 9.76923 (approximate)

Sides AC and BC are the same length as AB.

=====================================================

Work Shown:

AB = (3/2)x+4

AC = (1/5)x+9

These sides are equal to each other since all sides of an equilateral triangle are the same length.

AB = AC

(3/2)x+4 = (1/5)x+9

10*[ (3/2)x+4 ] = 10*[ (1/5)x+9 ] ... see note below

10*(3/2)x + 10*4 = 10*(1/5)x + 10*9

15x + 40 = 2x + 90

15x-2x = 90-40

13x = 50

x = 50/13

Note: I multiplied both sides by the LCD (lowest common denominator) 10 to clear out the fractions.

------------

Once we know what x is, we plug it into the expression for AB

AB = (3/2)x+4

AB = (3/2)*(50/13) + 4

AB = (3*50)/(2*13) + 4

AB = (3*2*25)/(2*13) + 4

AB = (3*25)/(13) + 4

AB = 75/13 + 4

AB = 75/13 + 52/13

AB = (75+52)/13

AB = 127/13 which is exact

AB = 9.76923 which is approximate

Because we have an equilateral triangle, AB = BC = AC.

8 0
3 years ago
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Step-by-step explanation:

6 0
2 years ago
Solve the equation -5 = c/7
sweet-ann [11.9K]
Multiply both sides by 7.

-5 * 7 = c/7 * 7

-5 * 7 = c

c = -35

Your final answer is c = -35.
3 0
3 years ago
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gtnhenbr [62]
Terriers = x
Labs = 5x
5x + x = 18
6x = 18
6x / 6 = 18/6
x = 3
There are 3 Terriers
3 0
3 years ago
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Eight oranges cost $1.00. How much will 5 dozen oranges cost?
kaheart [24]
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6 0
3 years ago
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