Solve eight and three fifths minus two and four ninths. a six and seven forty fifths
b six and seven fourteenths
c seven and seven forty fifths
d seven and seven fourteenths

so far i think you have the right thing going for you just remember soh cah toh

step-by-step explanation:

sine over hypotenuse

cosine   equals adjacent

tangent over hypotenuse

1. supplementary angles

2. acd and bcd

step-by-step explanation:

chemists are often responsible for designing a chemical reaction and analyzing the products obtained from it. one significant part of designing a chemical reaction is determining the amount of each reactant that is needed and the amount of each product that will be produced. in order to do so, chemists use stoichiometry, the quantitative relationships between reactants and products.

the answer is a. 72. but i cant answer with less than 20 characters so here's some random text talking about it.