Work out the percentage change when a price of £50 is increased to £80

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles