Which angles in the figure are straight angles?

a. ∠sqt and ∠ptr
b. ∠stq and ∠ptr
c. ∠str and ∠ptq
d. ∠qst and ∠prt

Why do interests rates on loans to be lower in a weak economy than in a strong one

You drop a rubber ball off the roof of a 50 meter high building onto a paved parking lot. it bounces back up with every bounce, but not quite all the way back up to you. after the first bounce it bounces back only 80 percent of the distance it was dropped from. the pattern continues, meaning after every bounce it comes up to just 80 percent of the previous maximum height. so if before the first bounce the height is 50 meters, what height does the ball reach after the fifth bounce? round your answer to one decimal place and chose the correct response from the choices below:

If the measure of angle 1 is 110 degrees and the measure of angle 3 is (2 x+10 degree), what is the value of x?