2(10x6) 4(5x3)
20 x 12 = 240
1 cubic foot of water weighs 62.42 lbs. so 20x12=240x240=57600 sq inx1= 57600 cu in . 1 cubic foot =1728 cu in. 57600/1728=33.333 33.333x62.42=2080.45 lbs
240
300
2(10x6) 4(5x3)
20 x 12 = 240
To calculate the BTUs needed to cool a room, multiply the square footage of the room by 20 (which is the recommended cooling capacity in BTUs per square foot). In this case, for a 20x12 room (240 square feet), you would need approximately 4,800 BTUs to effectively cool the space.
The distributive property is not used for simplified multiplication. See http://www.algebrahelp.com/lessons/simplifying/distribution for information about how to use the distributive property to simplify other equations. 20 x 12 is already simplified, so the proper way to solve it is 12 x20 ----- 240 You could potentially factor and use the commutative property to find a simpler equation, ex. 20x12 -- break 20 into 10 and 2 10x2x12 -- multiply 2 by 12 10x24 -- multiply by 10 240
27.5X12 20X12=120 (times table ten twelves) 7x12= 84 (times table seven twelves) 0.5X12= 6 (times table five twelves, divided by 10) Total 330
1 cubic foot of water weighs 62.42 lbs. so 20x12=240x240=57600 sq inx1= 57600 cu in . 1 cubic foot =1728 cu in. 57600/1728=33.333 33.333x62.42=2080.45 lbs
20x12=240 sq. ft; Divide by 9 ( 3x3= 1 sq. yard). 240/9= 26.667 sq. yards; 26.667 x 8.91= $237.60. Add some (usually about 5% of what you need to account for broken/cut tiles) So do the following... 26.667 x 0.05 = 1.33 yards. So add this to your value of $238...so for a little than than $10 more your safe on supplies. Answer: $237.60 + tax <-- Exact price/quantity $247.60 + tax <-- Safe Price/extra material