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babymother [125]
3 years ago
5

Which of the following diagram(s) show a pure substance?

Mathematics
2 answers:
Darya [45]3 years ago
8 0

Answer:

A,D,E,F,H,I

Step-by-step explanation:

because they have molecules joined on to them

Pavel [41]3 years ago
5 0

Answer:

B. A, D, E, F, H and I

Step-by-step explanation:

B is the answer

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Step-by-step explanation:

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Read 2 more answers
PLEASE HELP ME!!
Ludmilka [50]

Answer:

<h2>The population will reach 1200 after about 2.8 years</h2>

Step-by-step explanation:

The question is incomplete. Here is the complete question.

The population of a certain species of bird in a region after t years can be modeled by the function P(t) = 1620/ 1+1.15e-0.42t , where t ≥ 0. When will the population reach 1,200?

According to question we are to calculate the time t that the population P(t) will reach 1200.To do this we will substitute P(t) = 1,200 into the equation and calculate for the time 't'.

Given;

P(t) = \frac{1620}{1+1.15e^{-0.42t} } \\\\at \ P(t)= 1200;\\\\1200 =  \frac{1620}{1+1.15e^{-0.42t} }\\\\cross\ multiplying\\\\1+1.15e^{-0.42t} = \frac{1620}{1200} \\\\1+1.15e^{-0.42t}  = 1.35\\\\1.15e^{-0.42t} = 1.35-1\\\\e^{-0.42t} = \frac{0.35}{1.15}\\ \\e^{-0.42t}  = 0.3043\\\\Taking \ ln\ of\ both\ sides\\\\lne^{-0.42t}  = ln0.3043\\\\-0.42t = -1.1897\\\\t = \frac{-1.1897}{-0.42} \\\\t = 2.8 years\\\\

The population will reach 1200 after about 2.8 years

6 0
3 years ago
George has steak and chicken in the freezer. The temperature of the steak is -6.3°C, and the temperature of the chicken is -6.3°
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Hello!

The answer is steak's temperature = chicken's temperature since they are both -6.3°C

Hope this helps!
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at a center 240 people voted for three plays the ratio of people who voted for Annie to wicked is 5:2 and the ratio of people wh
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Step-by-step explanation:

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