20%=0.20
15.99 • 0.20 = 3.198
15.99 - 3.198 = 12.792
12.792 = $12.79
Probably
When dividing with fractions, you "keep, change, and flip" the problem.
This means that the 4 becomes 1/4, so they are equal to each other.
What it looks like:
÷ 4 -> x 
= keep
÷ = change to x
4 = flip to
Answer:
between 0 and 1: divide 1 by 2 = 0.5
between 1 and 1/2: divide 1/2 by 2 (0.25) and multiply that by 3 = 0.75
172/387 = 4/t
Let t = time to travel 387 miles
172t = 4(387)
172t = 1548
t = 1548/172
t = 9
Answer: 9 hours
Answer:
1024
Step-by-step explanation:
1 division: 2
2 divisions: 2×2 = 4
3 divisions: 2×(2×2) = 8
The number of viruses is 2^n, where n is the number of divisions.
After 10 divisions, there are 2^10 = 1024 viruses.
