If 20% of the students played in the band in the band has 40 members how many students are there

In the rectangle below ac=30 units what is de

The median am of triangle ∆abc is half the length of the side towards which it is drawn, bc . prove that triangle ∆abc is a right triangle, and find angle mac and abm

My hour hand points between the 8 and the 9 in 35 minutes it will be the next hour. what time is it ?