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goblinko [34]
3 years ago
14

In addition to oxygen, several gasses are in air. Carbon dioxide makes up 0.00039 of air. What is 0.00039 written as a percent ?

Mathematics
1 answer:
Simora [160]3 years ago
7 0
0.00039 x 100 = 0.039%
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A School decides to organize field trips for all students. Tickets for first years were sold at GH¢0.40 per student and continui
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Step-by-step explanation:

You can solve this problem by setting up a system of equations.

Let's say that the number of tickets bought by students in the first year is x, and the number bought by continuing students is y. From there, you can set it up like this:

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Since 300 of the 500 tickets bought were from the first year students, and 300/500 is 0.6, 60% of the students who bought the ticket were first year students. Hope this helps!

7 0
3 years ago
Two angles are supplementary and have a ratio of 1:4. what is the size of the smaller angle
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