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A car's radiator has a capacity of 15 quarts and it currently contains 12 quarts of a 30 percent antifreeze solution. How many quarts of pure antifreeze must be added to strengthen the solution 40 per?
The original solution has 3.6 quarts of antifreeze in it. The equation then becomes (3.6 + x)/(12 + x) = 0.40, where x is the amount of antifreeze added. X is then equal to 2.
How do you round 000.2 percent to the nearest tenth of a percent?
000.2 percent, which is the same as 0.2 per cent, is already rounded to the nearest tenth of a per cent.
What is 7 percent per annum on 164300?
11501 per annum.
How many inches per foot in a 2 percent slope?
Oh, dude, you're hitting me with some math now? Okay, okay. So, a 2 percent slope is like 2 inches of rise per 100 inches of run. And since there are 12 inches in a foot, you just divide 100 by 12 to get around 8.3 feet per foot on a 2 percent slope. Math is fun, right?
On a blueprint a square with 20 meters per side was shown as a square with 12 centimeters per side how long would a girder appear on the blueprint if the girder was actually 15 meters long?
Since 12 cm is .12 m the scale is .12/20 = .006 . Meaning on the graph 1 m is represented by .006 m or .6 cm. So 15 m would be scaled down to 15 x .6 = 9 cm on the graph.
