Find the effective rate of interest for 21% compounded quarterly

For how answer my question this will be the last question can you answer in math subject

Idon't want to fail summer school.the probabilities of contamination in medicine capsules due to the presence of heavy metals and different types of microbes are given in the table.the probability of capsule b having microbial contamination is (the same as, greater than, less than) the probability of capsule d having it.

Find four solutions of the given function. write the solutions as ordered pairs. 4x – y = 4