How many ounces of 21% alcohol solution and a 42% alcohol solution must be combined to obtain 35 ounces of a 30% solution ?

Given the statements, "a square root of 16 is 4," and "a square root of 9 is -3," complete the following blanks with the correct truth-values. p is and q is , so the statement, "a square root of 16 is 4 or a square root of 9 is -3" is .

Asurvey of 2,000 doctors showed that an average of 3 out of 5 doctors use brand x aspirin. how many doctors use brand x aspirin

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?