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PSYCHO15rus [73]
3 years ago
12

Matthew has been observing 10 bacteria in a petri dish for his science class. If the bacteria population doubles every 12 hours,

how many bacteria will be in the dish after 2 full days?
A. 20 bacteria
B. 40 bacteria
C. 80 bacteria
D. 160 bacteria
Mathematics
1 answer:
zheka24 [161]3 years ago
5 0
B 40 bacteria that's the answer lol
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A = {a, b, c, d}
Helen [10]

Answer:

Johnny is wrong.

A \cup B = \left\{a,b,c,d,e,f,g,h\right\}

Step-by-step explanation:

Johnny is wrong.

A better definition would be: A \cup B is the set of all elements that belong to at least one A or B.

So, the elements that belong to both A and B, like c and d in this exercise, also belong to A \cup B.

So:

A \cup B=\left\{a,b,c,d,e,f,g,h\right\}

4 0
3 years ago
If you rearrange the equation so w is the independent variable, then what is u?<br><br> -2u+6w=9
Serjik [45]

Answer:

u  = - ( 9-6w)/2

Step-by-step explanation:

to  evaluate for u in the expression -2u+6w=9 is simply to look for a way such that we would express u in terms of w and other variables.

solution

-2u+6w=9

-2u = 9 - 6w

divide both sides by the coefficient of u which is -2

-2u/u = 9 - 6w/-2

u  = - ( 9-6w)/2

therefore the value of u when rearranged in the equation -2u+6w=9 is evaluated to be equals to

u  = - ( 9-6w)/2

7 0
3 years ago
A teenager earns $10 for every 600 square feet mowed in addition to $12 for supplies for each lawn he mows. Which function repre
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Answer: b

Step-by-step explanation: 600 is the total so, just do 10x and 12

5 0
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A Salesman worked on a weekly salary of $180.00 . To this was added a commission of 5% on all sales over $500. It his sales for
Anvisha [2.4K]
250x.05 = 12.5 + 180 = 192.50
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Why is 1 + (−5) equal to −4?
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Answer:

because its 5 units to the left on a horizontal number line

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