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spayn [35]
4 years ago
14

A culture started with 2,000 bacteria. After 2

Mathematics
1 answer:
Ket [755]4 years ago
3 0

Answer: In 10 hours, 4000 bacteria will be present.

Step-by-step explanation:

Given that 2000 bacteria grew to 2400 in 2 hours,

growth/ increase rate = 2400 - 2000

= 400 bacteria increase in 2 hours

Per hour is therefore 400/2 = 200 bacteria increase per hour

If the bacteria increases by 200 per hour

If 200 = 1 hour

X = 10 hours

We cross multiply:

X = 200 x 10

X = 2000

Therefore, a culture with 2000 bacteria at the same growth rate will have increased by additional 2000 in 10 hours

So, after 10 hours, number of bacteria will be 2000 + 2000 = 4000 bacteria

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Plz answer this question:
alekssr [168]

Answer:

90°

Step-by-step explanation:

5x+20=9x

20=9x-5x

20=4x

x=5

5x+20+9x=

5(5)+20+9(5)=

25+20+45=

90

3 0
3 years ago
What is the surface area of the figure
stiv31 [10]
So just find the measues of the faces
15 times 4=rightmost face
9 times 4=oposite face
9 times 4=lower top face
to find topmost face
15-9=6
4 times 6=topmost face
sides
can be split up into 2 rectangles
15 by 9 and 6 by 6
2 of them
2 times (15 times 9+6 times 6)
bottom=15 times 4
not seen face=6 times 4

total area=(15 times 4)+(9 times 4)+(9 times 4)+(4 times 6)+(2 times ((15 times 9)+(6 times 6)))+(15 times 4)+(6 times 4)
total area=60+36+36+24+(2 times (135+36))+60+24
total area=60+36+36+24+(2 times 171)+60+24
total area=60+36+60+342+60+24
toal area=582

answer is B
3 0
3 years ago
Read 2 more answers
Joseph is creating a recipe and will use 1/4 cup salt and 2 cups of pumpkin seeds. write the ratio of the amount salt to pumpkin
Anon25 [30]
1/4 : 2 or 1/8 : 1. That is how I would have done it. I hope this helps you.
6 0
3 years ago
Find values of x and y for which ABCD must be a parallelogram. The diagram is not to<br> scale.
Fed [463]

Step-by-step explanation:

again option D x = 10, y= 3

is the correct answer of this question.

plz mark my answer as brainlist.if you find it useful.

<em>hope </em><em>this</em><em> will</em><em> be</em><em> helpful</em><em> to</em><em> you</em><em>.</em><em> </em>

8 0
3 years ago
Read 2 more answers
What are the solutions of 3x2 + 6x + 6 = 0<br><br> –2 ± i<br> –2 ± 2i<br> –1 ± i<br> 1 ± i
velikii [3]
C) Quick way:

3x^2+6x+6=0 ---> x^2+2x+2=0,

sum of solutions is the 'x' coefficient multiplied by -1:  (-1+i)+(-1-i)=-2-->2
Product is the independent term: (-1+i)(=1+i) = (-1)^2-i^2 = 1+1=2

Takes longer to write it down!

4 0
4 years ago
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