They can be compounds too.
Examples: salt, sugar, and water are all compounds, not elements or mixtures.
When rounding you look at the number right after the one you want to round. The tenth place is the one right after the decimal. If the number after it is more than five it goes up by one, it it's less than five it stays the same. So since the number after the 8 is a 3 it stays the same.
The answer is 7.8
Answer:
300 Btu per hour
Explanation:
given data
area = 100-square foot
thick = 12 inch
R value at 12 = 1.89
R value at 4 = 14.8
inside temperature = 65 degrees F
outside temperature = 15 degrees F
to find out
How many Btu per hour
solution
we get here How many Btu per hour that is express as
Btu per hour = ............1
put here value we get
Btu per hour =
Btu per hour = 299.580
so Btu per hour is 300 Btu per hour
Keller’s law of planetary motion is the law of planetary motion