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prisoha [69]
2 years ago
10

Research scientists need a certain type of bacteria to conduct an experiment. There are 2,500 bacteria in a certain culture. The

culture grows at a rate of 25% daily. The scientists needs at least 10,000 bacteria to conduct an experiment. What is the least number of days they need to wait for the bacteria culture to reach a quantity of 10,000? (Hint: use a guess-and-check method to determine the lowest number of days that satisfy the requirement.)

Mathematics
1 answer:
pychu [463]2 years ago
7 0

Answer:

  7 days

Step-by-step explanation:

At 25% per day, it will take approximately 3 days to double the population, so approximately 6 days for the population to quadruple. Checking that number, we find it is not quite enough for the experiment, so another day is required.

"Guess and check" as a method of solution works especially well if you have an automated checker to evaluate your guess. A graphing calculator or spreadsheet can work well for this.

_____

We guess 3 days as the doubling time using the "rule of 72" that says the product of percentage and doubling time is about 72. That is, 72/25 ≈ 3. (This is only a very rough approximation of doubling time, best for rates near 8%.)

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How to solve 7 2/6 + 8 5/6
natima [27]
Separate them first.
7+8=15
5/6+2/6=7/6
There can't be 7/6, so it becomes 1 and 1/6,
15+1+1/6=16 1/6
The answer is 16 1/6.
3 0
3 years ago
Write an equation in point-slope form of the line that passes through the given point and has the given slope. (3, –8); m = –5
Paraphin [41]

Answer:

y+8=-5(x-3)

Step-by-step explanation:

The formula for point-slope form is y-y1=m(x-x1)

The points for (x1, y1) are (3, -8), meaning that 3 is x1 and -8 is y1.

So, start by writing your equation like this: y--8=m(x-3)

For the equation y--8=m(x-3), the y--8 will change to a + sign because two negatives make a positive, right? So, the equation should now look like this: y+8=m(x-3).

We know that the slope (m) is -5. Plug that into the equation to get this: y+8=-5(x-3)

And there you have it!! The equation is now in point-slope form!!

y+8=-5(x-3) is the final answer!!

Hope that helps you!! Please give me brainliest!!

7 0
2 years ago
Could you show it step by step please and thank you
m_a_m_a [10]
1.To find the triangle area is base x height : 4.33 x 5=21.65
Perimeter : 5+5+5=15

2. 6•3=18+(3•2)=18+6=24=area
16=perimeter

3. Not sure

4. 12•17=204=area
Perimeter : 13+17+17=47

Hoped I helped!
8 0
3 years ago
Which is the graph of g(x) = [X + 3]?
Rudik [331]

Step-by-step explanation:

g(x) = [X + 3]? the answer is 1 =3x

6 0
3 years ago
Round 0.3782;hundredths
natali 33 [55]

Answer:

hundredth:0.3800

thousand:0.4000

tenth:0.3780

5 0
2 years ago
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