She bought 10 gold balls and 15 silver balls at a cost ₱520.00 but later on she realized that the design for the Christmas tree is still lacking. She bought 12 more gold balls and 20 more silver balls for ₱664.00.

i think it's either c or d

step-by-step explanation: the entire question is extremely odd. 04 obviously refers to the interest rate. honestly i will say the answer is c. because the (2 x 12) part would mean it's compounded semiannually. i'll say choose c.

.632

step-by-step explanation:

6 * 1/10 = 3/5

3*0.01 = 0.03

3/5 + 0.03 = .63

2*0.002 = .002

.63 + 0.002 = .632

1.30

step-by-step explanation: