13'x13' = 169 square feet
18'x13' = 234 sq feet = 21.74 square meters.
In a normal periodic table, the molar mass of a given element, is made up of multiplying the mass of a given isotope of that element, with the abundance of that given isotope in percent. For example, Say for the element X, you know that it has two isotopes, X12 and X13. X12 has a molar mass of 12 g/mol, and you know that of all the X molecules in the world, X12 is found 95% of the time, X13 has a molar mass of 13g/mol, yet its abundence is only 5%. Therefore average molar mass for element X is calculated as such, (12 * .95)+(13*.05) = 12.05 g/mol. hope that helps.
143 square feet.
130 square feet !
52 square feet. This is an easy calculation - just multiply the length by the width. The answer is the number of square feet.
19'x13'
Just multiply the two dimensions together. This gives you 208 square feet.
13'x13' = 169 square feet
18'x13' = 234 sq feet = 21.74 square meters.
18 feet x13 feet is ~21.7 square meters.
299 square feet = 33.22 square yards
You would need a total of 36 tiles to cover that area.
You will need 25, 13x13 tiles.
Multiply width by length to get the area. The answer would be 143 square inches.