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3 years ago

A population of bacteria doubles every 12 hours. Initially, the population of bacteria is 80.

1 answer:

5 0

A number of bacteria after 30 hours is 480 bacteria.
The answer is 480 because originally the amount was 80. After 12 hours it doubled to 160. Then after 24 hours have passed, the amount doubled again. So now the amount is 320 bacteria. Then 6 hours passed (half of 12 hours) so then you add half of that amount (160) to 320. 320 plus 160 is 480. So the answer is 480

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28.9-32.5<br> i will be fine i just forget the steps

Mademuasel [1]

Answer:

-3.6

Step-by-step explanation:

Since 32.5 is greater than 28.9, you just subtract 32.5 from 28.9 then add an equal sign. 32.5-28.9=3.6. With the negative, it would be -3.6

3 0

3 years ago

PLEASE HELP THIS IS TIMED<br> WHAT IS THE FOLLOWING SUM FIRST ONE IS QUESTION THE REST ARE CHOICES

murzikaleks [220]

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5 0

3 years ago

"eight times the difference of a number and three is sixty-four"?

morpeh [17]

Answer:

the number would be 11

Step-by-step explanation:

8 · x - 3 = 64

________ _ (divide both sides by 8)

8 8

x - 3 = 8

+ 3 + 3

x = 11

(check:

11 - 3 = 8

8 x 8 = 64 )

5 0

1 year ago

Read 2 more answers

If f(x) = 2x² +5 and g(x)=x2-2, find (f-g)(x).

Rufina [12.5K]

Answer:D. x^2+7

Step-by-step explanation:

If f(x) = 2x² +5 and g(x)=x2-2, find (f-g)(x).A. x^2+3B. 3x^2+3C. 3x^2+7D. x^2+7

4 0

1 year ago

A PE teacher is charting the weight and BMI of her students. The table below shows the measured weight for all of her students f

svetlana [45]

Answer:

122.67 average

Step-by-step explanation:

Mean = (every value added up)/(# of values)

Mean = (105 + 2(110) + 2(112) + 3(113) + 2(115) + 5(116) + 4(117) + 7(118) + 5(120) + 5(121) + 4(125) + 5(126) + 2(128) + 130 + 3(132) + 134 + 3(135) + 2(140) + 2(141) + 150)/60

= 7360/60

= 122.67

I had trouble understanding the data but I hope I did this right!

6 0

3 years ago