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3 years ago

5

A bacteria culture contains 100 cells and grows at a rate proportional to its size. After one hour the population has increased

to 480. Find an expression for the number of bacteria after t hours.

1 answer:

xenn [34]3 years ago

7 0

We know it begins at 100. If we use a*b^t, then 100 is our a. 100*b^t. We can now divide 480 by 100. This is 4.8. 4.8 is b. f(t) = 100(4.8)^t

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How many 1-centimeter cubes does it need to fill the rectangular prism below.

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Answer:

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Step-by-step explanation:

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<u>Hope this helps :)</u>

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3 years ago

on a scale drawing of a new school playground, a triangular area has two sides with lengths of 8 centimeters, 15 centimeters, an

xxTIMURxx [149]

The length of the longest side is 51 meters.

<h3>The perimeter of a triangular area:</h3>

This is the sum total of all the distance around the three sides of the triangle and it is expressed by using the formula:

P = a + b + c

where;

P = perimeter of the triangle
a,b,c = sides of the triangle

Let assume that:

a = 8 centimeters
b = 15 centimeters
c = 17 centimeters

The perimeter of the triangle = (8 + 15 + 17) centimeters

The perimeter of the triangle = 40 centimeters

The ratio on the scale drawing to the actual triangular area is:

= 40 cm : 120 m

= 1 cm : 3 m

Since the longest side is 17 centimeters, the length of the longest side is:

$\mathbf{=\dfrac{17 \ cm}{1 \ cm} \times 3 \ m }$

= 51 meters

Learn more about the perimeter of a triangle here:

brainly.com/question/323164

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