Dave paid off a loan with a simple interest rate of 7.7% in 6 months. What was the APR?

Find the interior angle of a regular polygon which has 6 sides

Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a diamond or heart. (type an integer or a decimal rounded to three decimal places as needed.) (b) compute the probability of randomly selecting a diamond or heart or club. (type an integer or a decimal rounded to three decimal places as needed.) (c) compute the probability of randomly selecting queen or club. (type an integer or a decimal rounded to three decimal places as needed.)

Lines a and b are perpendicular. if the slope of line a is 3, what is the slope of line b?