3.4 the coldest recorder temperature on earth in a natural environment is about -90 c. at what frequency, is the standard kpt for thermal noise power spectral density approximation wrong by 10 %?

Rectangle qrst is shown. angle qrt is congruent to angle str, and angle str is complementary to angle qtr. which statement is true about angles qrt and qtr? they are congruent. they are complementary. they are supplementary. they are right angle