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polet [3.4K]
3 years ago
13

A culture of bacteria has an initial population of 420 bacteria and doubles every 5 hours. Using the formula P_t = P_0\cdot 2^{\

frac{t}{d}}P t ​ =P 0 ​ ⋅2 d t ​ , where P_tP t ​ is the population after t hours, P_0P 0 ​ is the initial population, t is the time in hours and d is the doubling time, what is the population of bacteria in the culture after 9 hours, to the nearest whole number?
Mathematics
1 answer:
AleksandrR [38]3 years ago
3 0

Answer:

gl

Step-by-step explanation:

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1. 10(.15)=1.5
Fed [463]

Answer:

6.14125(0.15) = 0.9211875 (below 1)

6.14125 - 0.92118 = 5.22007

Step-by-step explanation:

Given data

1. 10(.15)=1.5

2. 10-1.5=8.5

3. 8.5 (.15)=1.275

4. 8.5-1.275=7.225

continuation the sequence

5)    7.225 (0.15) = 1.08375

6)    7.225 -  1.08375 = 6.14125

7)  <u> 6.14125(0.15) = 0.9211875   (below -one)</u>

8 ) <u> 6.14125 - 0.9211875 = 5.2200625 (get number 5)</u>

9)   5.2200625(0.15) = 0.783009

10) 5.2200625 - 0.783009 = 4.4370532

3 0
3 years ago
Sam is flying a kite. The length of the kite string is 80 meters, and it makes an angle of 75° with the ground. The height of th
olya-2409 [2.1K]

Answer:

THE HEIGHT OF THE KITE FROM THE GROUND=80mtr

Step-by-step explanation:

let H be the height of kite from ground

\sin\theta=\frac{height}{hypotenuse}

\sin\90=\frac{H}{80}

1=\frac{H}{80}

H=80meters

5 0
3 years ago
If y varies inversely as x, and y = 23 when x<br> 8, find y when x 4.
Virty [35]

Answer:

y = 46

Step-by-step explanation:

Given y varies inversely as x then the equation relating them is

y = \frac{k}{x} ← k is the constant of variation

To find k use the condition y = 23 when x = 8 , then

23 = \frac{k}{8} ( multiply both sides by 8 )

184 = k

y = \frac{184}{x} ← equation of variation

When x = 4 , then

y = \frac{184}{4} = 46

7 0
3 years ago
Please help with #9 and 10?
son4ous [18]
The value of m is 35 degrees, because the right angle is 90 degrees, therefore, 90-55=35.
The value of t is 55 degrees because is perpendicular to the other 55 degree angle.
4 0
3 years ago
BRAINLIEST FOR WHOEVER ANSWER CORRECTLY!!!
WARRIOR [948]

Answer:

39/50 and 0.78

Step-by-step explanation:

78% = 78/100 (or 78 hundredths) = 0.78

39 ÷ 50 = 0.78

6 0
3 years ago
Read 2 more answers
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