how many liters of a 90% acid solution must be mixed with a 15% acid solution to get 225 L of a 80% acid solution?

you bought a snowboard for 25 percent off. You then received a point-of-sale rebate of $20 before taxes. Sales tax[..]

A bird sitting 16 feet above the ground in an apple tree dislodges an apple. After how many seconds does the apple[..]

Eye color is determined by genetic combination. Ler R represent the gene for brown eyes and L represent the gene for[..]

Michelle gets a hit 28% of the time she bats. Estimate the probability that she will get at least 4 hits in her next[..]

a man s stock earn $145, 000, 000. if these earning represent $1.14 per share, how many share of stock are there?

The three angles in a triangle always add up to 180. if one angle in a triangle is 108 and the second is 5 times the[..]

Left A= {0, 1, 2, 3, 4, 5} and B= {6, 7, 8, 9} How many distinct pairs are in AxB?

Two angles of a triangle have the same measure. The measure of the third angle is 4 degrees less than twice the[..]

On August 6, 2009, the U.S. Senate confirmed Sonia Sotomayor, as the 11th Justice of the United States Supreme[..]