A chemist has two acid mixtures, one that is 20% HCI (Hydrochloric Acid) and another that is 60% HCI. How much of each mixture should be mixed if the chemist wants to obtain 100ml of acid mixture that is 34%

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.

Which of the following circles have their centers in the third quadrant?

The weight of a radioactive isotope was 96 grams at the start of an experiment. after one hour, the weight of the isotope was half of its initial weight. after two hours, the weight of the isotope was half of its weight the previous hour. if this pattern continues, which of the following graphs represents the weight of the radioactive isotope over time? a. graph w b. graph x c. graph y d. graph z