Step-by-step explanation:
we have 8 equally "heavy" batches.
one weighs 3.9 × 10^-10 g
so, the total sample then weighed
8 × 3.9 × 10^-10 = 31.2 × 10^-10 = 3.12 × 10^-9 g
The answer is 1 and 7/8, all you have to do is turn the 3/4 into eighths.
Answer:
6d-30
Step-by-step explanation:
6(d-5)
6d-30 distributive property
