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timama [110]
3 years ago
8

How many hours will it take a culture of bacteria to increase from 20 to 2000 if the growth rate per hour is 85%

Mathematics
1 answer:
galben [10]3 years ago
3 0

Answer:

Approximately

7.5

hours

Step-by-step explanation:

Explanation:

We are trying to determine the value of

h

in the compound growth formula

XXX

20

×

(

1

+

0.85

)

h

=

2000

or, simplified:

XXX

1.85

h

=

100

Taking the

log

1.85

of both sides:

XXX

log

1.85

100

With the aid of my trusty spreadsheet:

XXX

h

≈

7.48582192

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If you need help comment below and ill try my best to help you out!
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Solve for m.<br> 22m^2 + 7m - 2 = 0
pshichka [43]

Answer:

x= -1/2 and x=2/11

Step-by-step explanation:

Write the 7x as a difference. It'll make it easier to factor out. An example of this would be 11x-4x

Therefore, the equation would look like this: 22x^2 + 11x-4x -2 =0

Look at it as if there are two equations: 22x^2+11x and -4x-2

Factor out the greatest common factor, which is 11 from the first equation. The equation will then look like this: 11x(2x+1)

Take the GCF for the second equation as well (which is -2). The equation should then also look like this: (2x+1)

Use the numbers on the outside of each of the parenthesis to form its own equation (to factor it out). This will be 11x-2

Now we have factored! Since the parenthesis equations are the same, we know that that is also part of the equation, so:

(11x-2)(2x+1)

Solve each equation for x by equaling them both to zero

5 0
3 years ago
DG¯¯¯¯¯¯ , EG¯¯¯¯¯ , and FG¯¯¯¯¯ are perpendicular bisectors of the sides of △ABC . DG=5 cm and BD=12 cm.
jonny [76]
Given that <span>DG, EG, and FG are perpendicular bisectors of the sides of △ABC, this means that the point of intersection, G, is the circumcenter of the triangle and hence A</span><span>G, BG, and CG are equal.

Given that </span><span>DG = 5 cm and BD = 12 cm, then

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3 0
3 years ago
Someone quickly hell
Elza [17]

Answer:

£3,780

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Total rows = 19 rows

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Total number of seats at the concert = Total rows × seats per row

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532 - 100 = sold tickets

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= £3,780

3 0
3 years ago
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