Write the complex number 12-16i in polar form. express the argument in degrees

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

How many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.) how many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.)

In a right triangle δabc, the length of leg ac = 5 ft and the hypotenuse ab = 13 ft. find: b the length of the angle bisector of angle ∠a.