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N76 [4]
3 years ago
14

Common Core Literacy

Mathematics
1 answer:
Genrish500 [490]3 years ago
8 0

Answer:

21x-28

Step-by-step explanation:

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A and b are natural numbers. The diameter of cell a is 2.3 , and the diameter of cell b is 2.3 .
Pani-rosa [81]

After clarification we see the respective diameters are

A = 2.3 \times 10^{-a}

B = 2.3 \times 10^{-b}

We're asked about the ratio

A:B =  2.3 \times 10^{-a} :  2.3 \times 10^{-b} = 10^{-a} : 10^{-b} = 10^b : 10^a = 10^{b-a} : 1

Now we can go through the choices.

A. If a = 4 and b = 6, then cell a is 100 times greater than cell b.

A:B=10^{6-4}:1 = 100:1

It would be more proper to say the diameter of cell A is 100 times the diameter of cell B, but yes, this is TRUE.

B. If a = 4 and b = 6, then cell b is 100 times greater than cell a.

FALSE. 10 to the minus 4 is 100 times bigger than 10 to the minus 6, so a is bigger.

C. If a = 4 and b = 6, then cell a is 2 times greater than cell b.

FALSE. We already calculated its 100 times bigger.

D. If a = 4 and b = 6, then cell b is 2 times greater than cell a.

FALSE.


8 0
3 years ago
Read 2 more answers
A souvenir maker wants to create a scale model of the Empire State Building. The Empire State Building is 1,472 feet tall and ha
Elan Coil [88]
It looks like this 1472x=6=\ \textgreater \ 6/1476=scale=.004076. So the answer is <span>A) 1.2 in. by 1.2 in.</span>
7 0
3 years ago
3х + бу = 24<br> figure out x and y intercept
____ [38]

Answer:

x int... (8,0)

y int... (0,4)

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Whitney’s pilot training requires her to log 40 hours of flight time. After two weeks, she logged 8.25 hours. After two more wee
IrinaK [193]
The answer i got when i worked it out with my math teacher was C
6 0
3 years ago
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A plane left Atlanta at 4:50 and arrived at Boston in 3 hours and 15 minutes. When did it arrive in Boston?
sashaice [31]

Answer: 8:05 pm

Step-by-step explanation: 4 hours + 3 hours = 7 hours

50 min + 15 min = 1 hour, 5 min

add those together

watch out for time zones when crossing

4 0
2 years ago
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