Answer:
0.2%
Step-by-step explanation:
2,000 people tested the new shampoo.
4 people had a mild allergic reaction.
4 is what percentage of 2,000?
0.2 percent.
(2,000 = %99.8)
Density = mass / volume
Givens
Density = 13.6 grams / cm^3
mass = 47 grams.
Solve
D = m/v
13.6 = 47 / volume Multiply by volume
13.6 * volume = 47 Divide by 13.6
volume = 47 / 13.6
Volume = 3.46 ccs
27 is very hard to see
28: 0.4=10
4/10=10
10/4 times 10 is 25
There are 25 students in the class
