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4 years ago

8

There are 70,000 bacteria present in a culture. An antibiotic is introduced to the culture and the number of bacteria is reduced

by half every 4 hours. Which of the following statements are true? Select all that apply

1 answer:

saveliy_v [14]4 years ago

5 0

options? then I can figure it out :)

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In Chelsea's group, there are three boys and six girls. Write a fraction to represent the amount of boys in the group.

Sati [7]

In total they're 9 people and 3 boys which would mean it would be 3/9

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3 years ago

How is this number expressed in scientific notation?

xenn [34]

Answer:

$5$ × $10^9$

Step-by-step explanation:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the 10 . If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

$5$ × $10^9$

<em>Finito </em>:D

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3 years ago

There are 12 kids in this class including you. If every person shakes hands with every other person, how many handshakes will th

Monica [59]

Answer: 132 handshakes in total

Step-by-step explanation: 11x12 because one of them will be the one shaking hands with everyone else so he would have gotten 11 hands shaked so everyone would have gotten their hands shaked 11 times

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3 years ago

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Musya8 [376]

Answer:

1/50 is abswer ........

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3 years ago

Find the value of c that completes the square x2+34x+c

ruslelena [56]

Answer:

c = 289

Step-by-step explanation:

Given

x² + 34x

To complete the square

add ( half the coefficient of the x- term )² to x² + 34x

= x² + 2(17)x + 17²

= x² + 34x + 289 ( with c = 289 )

= (x + 17)² ← perfect square

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3 years ago