Answer:
d =
Step-by-step explanation:
Given
= 16(d + 1) = - 20 ← distribute parenthesis on left side
- 16d - 16 = - 20 ( add 16 to both sides )
- 16d = - 4 ( divide both sides by - 16 )
d = =
length = width + 200m
Perimeter = 1000 (the sum of all the sides)
Perimeter = 2*W + 2* (w+ 200)
P = 2*W + 2*W + 2*200
Replacing the perimeter value
1000 = 2*W + 2*W + 2*200
1000 = 4*W + 400
4W = 1000- 400
w= 600/4
w= 150
______________________
The dimensions
width = 150 m
length = width + 200
= 150 + 200
= 350 m
________________
Answer
Width = 150 m
Length = 350 m
cost of snack=4+3+2=9
butno cost given for admission
The 85th percentile is the cutoff time
such that
In other words, the 85th percentile refers to the time needed to belong to the top 15% of the distribution; more generally, the
percentile is the top
of the distribution.
Anyway, to find this value of
, transform
to a random variable
with the standard normal distribution using
where
is the mean of
and
is the standard deviation of
.
Here
is used to denote the z-score corresponding to the cutoff time
. Referring to a z-score table, you find that this occurs for
. So,