Jack is learning to play piano. he knows that a piano has 88 keys and that there are 12 unique keys in each group called octave. how many complete octaves are on a piano?

Aclass consists of 55% boys and 45% girls. it is observed that 25% of the class are boys and scored an a on the test, and 35% of the class are girls and scored an a on the test. if a student is chosen at random and is found to be a girl, the probability that the student scored an ais

Which of the following statement about pascal's triangle are true?

Which of the following is the true for f(x) = 5cos