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Dennis_Churaev [7]

2 years ago

11

There were 50,000 bacteria in a petri dish yesterday at noon, and 40,000 bacteria at noon today. if the trend continues, on what

day at noon can you expect to find less than 5,000 bacteria?

1 answer:

Arlecino [84]2 years ago

7 0

Answer:

900

Step-by-step explanation:

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Last year at a certain high school, there were 100 boys on the honor roll and 60 girls on the honor roll. This year, the number

defon

Answer:

last year 100 boys and 60 girls, for a total of 160.

this year, 120 boys and 75 girls, for a total of 195.

35 more than 160 is a 21.8% increase

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3 years ago

Simplify the expression: 2m + 4m - 8

kati45 [8]

Answer:

Step-by-step explanation:21

8 0

3 years ago

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Identify the range of the following numbers 7,9,15

Alik [6]

The range is subtracting 15-7.

This equals 8.

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7 0

3 years ago

Please tell me the answer as simple as you can

lilavasa [31]

Answer:

1 commutative

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3 associative

4 identity

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Step-by-step explanation:

8 0

3 years ago

a guy wire for a tree is 20 ft long, making a 21 angle with the ground. How far is the base of the tree from a stake anchoring t

evablogger [386]

Answer:

18.7 feet far

Step-by-step explanation:

Based on the information given we can conclude that our set up will be a Right triangle (i.e. one angle is 90°), where the hypotenuse will be denoted by the guy wire of $20ft$ and angle of 21° is the angle formed between then hypotenuse and the base (i.e. ground).

Thus we want to find the base length (lets call it $x$ ) of this triangle, so we can use trigonometry as we have one angle and the hypotenuse, as follow:

$cos(21)=\frac{adjacent side}{hypotenuse}=\frac{baselength}{guywire}\\\\ cos(21)=\frac{x}{20} \\x=20cos(21)\\x=18.671\\x=18.7ft$

So the base is approximately 18.7 feet far from the tree of the anchored wire.

8 0

4 years ago