Does the choice of the base affect the area of a parallelogram

5,600 x 10^3 = a) 560 b) 5,000,600 c) 5,600,000 d) 56,000

Someone me! if you’re smart you can solve this!

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of