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iren2701 [21]
2 years ago
13

Before there was any life on Earth, which gas was absent from the ancient atmosphere?

Mathematics
1 answer:
Mademuasel [1]2 years ago
5 0
If I am right it should be D because pigs make methane
You might be interested in
What is 15 hours and 60 minutes in simplest form
Lilit [14]
Good Afternoon,

Okay so we have 15 hours already, now we need to add 60 minutes, which is exactly an hour. 

So, 15 Hours + 1 Hour = 16 Hours. 

16 Hours is your answer, I hope I helped and good luck studying!

Thank you, 
Darian D. 
8 0
3 years ago
Area of square whose side is 11 cm ________
Gnom [1K]

Answer:

121 cm²

Step-by-step explanation:

Square's area formula is

A=a²

where a stands for a side of the square

A=(11 cm)²

A=121 cm²

whenever you're talking of area you put cm²

8 0
2 years ago
Read 2 more answers
If n =270 and (p-hat) =0.43, find the margin of error at a 99% confidence level.. give answer to 3 decimals
Troyanec [42]

Answer:

0.078

Step-by-step explanation:

Margin of error = z√(p(1-p)/n)

Given

p-hat = 0.43

n = 270

z at 99% confidence interval = 2.576

Substitute

MOE = 2.576√0.43(1-0.43)/270

MOE = 2.576√0.43*0.57/270

MOE = 2.576√0.2451/270

MOE = 2.576*0.030129

MOE = 0.078

Hence the margin og error is 0.078

7 0
2 years ago
Solve.<br> x<br> __<br> 2 = 7<br> ----------------------------------------<br> PLEASE HELP!
galina1969 [7]
\frac{x}{2} = 7\\\\\frac{x}{2} \times 2 = 7\times2\\\\\boxed{x=14}
5 0
3 years ago
George walked around the entire perimeter of his rectangular garden. The length of his garden was 12 yards and the width was 8 y
Marina86 [1]
To find perimeter, you use this equation for a parallelogram:
2l+2w=p
Let’s not put the numbers in,
2(12)+2(8)
24+16
40
So b, 40 yards is how much he walked.

















To
8 0
3 years ago
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