for a March past competition on sports day the house captain of one house cut 25 pieces of ribbon each 1/2 metre in length. what was the length of ribbon cut altogether​

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.

If you answer 2+2 you will get over 80 points

An investment decreases in value by 30% in the first year and decreases by 40% in the second year. what is the percent decrease in percentage in the investment after two years