In a certain chemical, the ratio of zinc to copper is 3 to 14. A jar of the chemical contains 378 grams of copper. How many grams of zinc does it contain? PLEASE RN ASAP 30 POINTS

Multiply. write your answer in simplest form. 3/8 x 5/7

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

Ahypothesis is: a the average squared deviations about the mean of a distribution of values b) an empirically testable statement that is an unproven supposition developed in order to explain phenomena a statement that asserts the status quo; that is, any change from what has been c) thought to be true is due to random sampling order da statement that is the opposite of the null hypothesis e) the error made by rejecting the null hypothesis when it is true