PLEASE HELP!

What additional information is needed to prove that the triangles are similar?

Given the choice between receiving $1.000.000 in one month or a single penny-doubled everyday for the period of one month; which option would you choice? show your work to support your answer. (assume that 1 month=30 days)

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

Which equation expression the relationship between the number of boxes b and the number of cans c and the proportion is 48