No solution there are no values of x
Answer:
a) Function? No
b) Domain: 
c) Range: 
Step-by-step explanation:
a) Function? No
We want to determine whether the graph of the relation is a function or not.
When we draw a straight line at x=-1, it will intersect the graph at several points, therefore the graph fails the vertical line test and hence it is not a function.
b) The domain refers to all x-values for which the function is defined.
From the graph the domain is
because the ends of the graph are closed.
c) The range is the set of all y-values for which the graph is defined.
From the graph the range is 
Answer:
a) sample size ≥ 30
b) 0.0017
Step-by-step explanation:
a) The central limit theorem states that for population with mean μ and standard deviation σ and take sufficiently large random samples from the population. This will hold provided the sample size is sufficiently large (usually n > 30) for a normal population.
Therefore the sample size should be greater or equal to 30 i.e n ≥ 30.
b) Given that n = 45, μ = 11.4 minutes and σ = 3.2 minutes, the z score (z) is given by the equation:

Substituting values to get:

Using the z table:
P(x < 10) = P(z < -2.93) = 0.0017
the probability that a random sample of n=45 oil changes results in a sample mean time of less than 10 minutes is 0.0017
Answer:6.37%
Step-by-step explanation:
Currently, the total number of computer programmers employed in a certain country is approximately
455000
By next decade, this number is expected to increase to 484000
To determine the increase in the number of computer programmers in a decade, we will subtract the current number of computer programmers from the expected number of computer programmers in the next decade. It becomes
484000 - 455000 = 29000
To determine the percent increase, we will divide the increase in computer programmers by the number of computer programmers currently and multiply by 100. It becomes
29000/455000 × 100
= 6.37%