2. Petronila purchased 20 books. The 1st book costs P50, the 2nd P100, the 3rd, P200, and the 4th, P400, and so on. How much did Petronila pay for the 20 books?
Petronila purchased 20 books. The 1st book costs P50, the 2nd P100, the 3rd, P200, and the 4th, P400, and soon.How much did Petronila pay for the 20 books?
Answers & Comments
Petronila purchased 20 books. The 1st book costs P50, the 2nd P100, the 3rd, P200, and the 4th, P400, and soon.How much did Petronila pay for the 20 books?
Solution:
50
100
200
+ 400
750