Answer:
46765 D
Step-by-step explanation:
y= C x 3^t
= 1000x3^3.5
= 46765
I think!
Use trinomial factorization, you get, x=-5
Answer:
40+20=60
this includes the sum of the women smoking and having cancer. i.e we have counted the women having cancer and smokes twice since they belong to both sets when one set is considered. Therefore we have to deduct one set of the common women from the previous sum.
60-13=47%
Answer: The percentage of hotels in the city have a nightly cost of more than $200 is 21%
Step-by-step explanation:
Since the nightly cost of hotels in a certain city is normally distributed,
we would apply the formula for normal distribution which is expressed as
z = (x - µ)/σ
Where
x = the nightly cost of hotels.
µ = mean cost
σ = standard deviation
From the information given,
µ = $180.45
σ = $24.02
The probability that a hotel in the city has a nightly cost of more than $200 is expressed as
P(x > 200) = 1 - P(x ≤ 200)
For x = 200,
z = (200 - 180.45)/24.02 = 0.81
Looking at the normal distribution table, the probability corresponding to the z score is 0.79
Therefore,
P(x > 200) = 1 - 0.79 = 0.21
The percentage of hotels in the city have a nightly cost of more than $200 is
0.21 × 100 = 21%