Find the domain and range of f(x) = |x| + cosx

Mathematics

1 answer:

Rasek [7]3 years ago

3 0

Answer:

D. domain: (-infinity, infinity); range: [1, infinity)

Step-by-step explanation:

The domain is the values that x can take

The domain is (-infinity, infinity)

The range is the values that y can take

absolute value is 0 or greater

cos x is from -1 to 1

The minimum value is when x=0

The smallest value is 1 and the largest is infinity

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A random telephone survey of 1021 adults (aged 18 and older) was conducted by Opinion Research Corporation on behalf of Complete

Wewaii [24]

Answer:

a. See attachment below

b. 613 people

c. Categorical

Step-by-step explanation:

a. View attachment below

Given

Total Number of People Surveyed = 1021

X tax return by professional / Number of People Surveyed = 60%

X tax /1021 = 0.6

X tax = 0.6 * 1021

X tax = 612.6

X tax = 613------ Approximated

So, the number of people used an accountant or professional tax preparer are 613.

The data for preparing a tax return will be considered as categorical as the methods for a person to file his/her tax returns are categorized into four which are:

1.Electronically

2.Manual preparation

3.Online tax service

4.Use of software tax program