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Elina [12.6K]
2 years ago
7

An experiment starts with 30 bacteria. After 4 hours, there are 135 bacteria. How long will it take for the bacteria population

to reach 4,500? Round to the nearest tenth of an hour. You must show your work to receive credit.
Mathematics
2 answers:
kykrilka [37]2 years ago
5 0

Answer:

1.8

Step-by-step explanation:

4/4:135/4

1hr:33.75

4500/33.75=1.8hr

hjlf2 years ago
5 0
To figure out the rate per hour u have to do 135 minus 30 to get 105
then divide that by 4 to get 26.25 THEN divide 4,500 by 26.25 to get ur answer: 171.4 hours
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This is confusing for me please someone help T-T
dezoksy [38]

Answer:

x = 39

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Step-by-step explanation:

to find x you do

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subtract 51 from both sides

x = 39

to find y

we already know part of y is a right angle (90 degrees)

so we need to find the tiny other part

this tiny other part is equal to x

so

90 +39 = 129

7 0
3 years ago
Item 2
UkoKoshka [18]

Answer:

12 units squared.

Step-by-step explanation:

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3 years ago
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9 cm²  have been cut out of the 45 cm²  of the complete big rectangle.  So the remaining area of the figure is  45 - 9 =<em> 36 cm²</em> .

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Answer:

A

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