What is the value of pie ? (write in fraction and numerical value also)

Combined megan and kelly worked 60 hours. kelly worked twice as many hours as megan. how many hours did they each worked?

Rachel reads 1/5 of the pages of a book plus 12 pages on the first day. on the second day, she reads 1/4 of the remaining pages plus 15 pages. on the third day, she reads 1/3 of the remaining pages plus 18 pages. on the fourth day, she reads the remaining 70 pages. how many total pages are in the book?

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angles. measure need asap