Answer:
Option (4)
Step-by-step explanation:
From the graph attached,
Equation of the wave function is a cosine function.
Let the graphed function is, f(x) = -Acos(bx - ∅)
Amplitude of the given function,
A = = 4 units
Period = = 2π
b = = 1
Given graph is starting from (0, 0).
Therefore, from the given graph, Phase shift of the cosine curve = ∅ =
Therefore, equation of the given cosine function will be,
f(x) = -4cos(x - )
Option (4) will be the answer.
Answer:
B.77.4%
Step-by-step explanation:
Mean wage (μ) = $4.50
Standard deviation (σ) = $0.50
For nay given salary X, the z-score is given by:
For X = $3.75, the z-score is:
For X = $5.00, the z-score is:
A z-score of -1.5 corresponds to the 6.68th percentile, while a score of 1 corresponds to the 84.13th percentile. Therefore, the percentage of workers getting paid between $3.75 and $5.00 an hour is:
The answer is alternative B.77.4%
since this is a multiplication, all the numerators are just factors of the product numerator and all denominators are just factors of the product denominator, so we can simply reorder them some, without changing the product.