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Fynjy0 [20]
3 years ago
13

A common inhabitant of human intestines is the bacterium escherichia coli, named after the german pediatrician theodor escherich

, who identified it in 1885. a cell of this bacterium in a nutrient-broth medium divides into two cells every 20 minutes. the initial population of a culture is 40 cells.(
d. find the rate of growth after 7 hours. (round your answer to the nearest integer.)
Mathematics
1 answer:
Ivahew [28]3 years ago
4 0

Dividing of cells a sample problems of geometric progression. Given that the intial number of cells is 40, then it will double every 20 minutes. Within 7 hours the cells will divide into w by 21 times. So the number of cells after 7 hrs is 4,194,040 cells.

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X-5y=-15x−5y=−15x, minus, 5, y, equals, minus, 15 Complete the missing value in the solution to the equation. (-5,(−5,left paren
Y_Kistochka [10]

Answer:

<h2>The missing value is 2. The coordinate will be (-5, 2)</h2>

Step-by-step explanation:

The question is not properly written. Find the correct question below.

If x – 5y = -15 . Complete the missing value in the solution to the equation (-5, ____)

Let the coordinate of the variables be (x, y). Comparing the coordinates (x, y) with the given coordinate (-5, __), we will discover that x = -5. To get the y coordinate, we will substitute x = -5 into the given expression as shown;

If x – 5y = -15

-5 - 5y = -15

Adding 5 both sides

-5-5y+5 = -15+5

-5y = -10

Dividing both sides by -5;

-5y/-5 = -10/-5

y = 2

<u>Hence the missing value in the solution of the equation is 2</u>. The coordinate will be (-5, 2)

3 0
2 years ago
The local swim team is considering offering a new semi-private class aimed at entry-level swimmers, but needs a minimum number o
SCORPION-xisa [38]

Answer:

The significance level is \alpha=0.01 and since we are conducting a right tailed test we need to find a critical value who accumulate 0.01 of the area in the right of the normal standard distribution and we got:

z_{\alpha/2}= 2.326

So we reject the null hypothesis is z>2.326

Step-by-step explanation:

For this case we define the random variable X as the number of entry-level swimmers and we are interested about the true population mean for this variable . On specific we want to test this:

Null hypothesis: \mu \leq 15

Alternative hypothesis: \mu > 15

And the statistic is given by:

z =\frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}

The significance level is \alpha=0.01 and since we are conducting a right tailed test we need to find a critical value who accumulate 0.01 of the area in the right of the normal standard distribution and we got:

z_{\alpha/2}= 2.326

So we reject the null hypothesis is z>2.326

7 0
3 years ago
How many 2s are 120
sammy [17]

Answer: 2 can go into 120 60 times.

Step-by-step explanation:

120/2 = 60

6 0
3 years ago
Read 2 more answers
This one is confusing for me. Can someone please help me?
sveta [45]

Solution:

f(x)=2^{(x-5)}\\f(8)=2^{(8-5)}\\f(8)=2^{(3)}\\f(8)=8

Answer:

8

<em>Hope this was helpful.</em>

4 0
2 years ago
It took a cheetah 45 minutes to run from Jungle A to Jungle B. If the average speed for the trip was 80 km/h, what is the distan
timama [110]
3/4 of 80 is 60, so the distance is 60 km. 45/60 is 3/4, which is how you get the answer
3 0
3 years ago
Read 2 more answers
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