Answer:31
Step-by-step explanation:
180-149
Answer:
-2.5
Step-by-step explanation:
-1/2 is the number it is being miltiplied by
Answer:
41%
Step-by-step explanation:
1200-850=350
350 is the markup, now we need the percentage
the orginal price was 850 so we just need to divide 350 by 850
we get 0.4117...
convert that to a percentage and we have 41% markup
H = 27
subtitute the value of h to the expression h : 9
h : 9 = 27 : 9 = 3
Answer:
Step-by-step explanation:
Let x be the random variable representing the lifespan of laptops. Since the lifespans are normally distributed and population mean and population standard deviation are known, we would apply the formula,
z = (x - µ)/(σ/√n)
Where
x = sample mean
µ = population mean
σ = standard deviation
n = number of samples
From the information given,
µ = 24.5
σ = 2.6
n = 33
the probability that the mean lifespan of these laptops will be less 23.8 months is expressed as
P(x ≤ 23.8)
For x = 23.8
z = (23.8 - 24.5)/(2.6/√33) = - 1.55
Looking at the normal distribution table, the probability corresponding to area on the left of the z score is 0.061
P(x ≤ 23.8) = 0.061