The energy released by respiration originally came from the sun.
True
Or
False

PLEASE HELP M

Alex drew a circle with right triangle prq inscribed in it, as shown below: the figure shows a circle with points p, q, and r on it forming an inscribed triangle. side pq is a chord through the center and angle r is a right angle. arc qr measures 80 degrees.

For each proportion find the unknown number x 1/5/8=×/15

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?