Answer:
perimeter = 6w
area = 2w^2
Step-by-step explanation:
we can use the variable w for width, and 2w for length perimeter would be width + width + length + length, or 6w
area is width x length or 2w^2
Answer:

Step-by-step explanation:
From the question we are told that
5% solution of dextrose sugar in water
20% solution of dextrose in
100 milliliters of distilled water water
Generally in mathematically solving we call A the amount of D20W added
Since 20% of dextrose is needed

Total quantity after addition (100+x)
for DW5% total solution is


Mathematically




Therefore the required quantity 
Answer: 48 ft
Step-by-step explanation:
Given
Height of street light h=12 ft
length of shadow x=18 ft
Shadow length of building x'=72 ft
suppose the height of the building is y
from the figure, we can write

12 years
just for extra space
To solve this question, use the Binomial probability formula.
The formula is given by

Where:
n = the number of trials
x = the sample we aim to try
p = the probability of success
In this question:
n = 16
x = 9
p = 0.5
Substituting in the equation:

And the combination formula:

Then:

Answer: The probability is 0.1746.