The average annual salary of the employees of a company in the year 2005 was $70,000. It increased by the same factor each year and in 2006, the average annual salary was $82,000. Let f(x) represent the average annual salary, in thousand dollars, after x years since 2005. Which of the following best represents the relationship between x and f(x)?

Answers

Answer 1
Answer: We can make use of the general formula for the geometric series to generate the function representing the average annual salary.
an = a0(r)^(n-1)

Or
f(x) = a0(r)^(x - 1)

Plugging in the given values for the year 2005 and 2006 to ge the value of r.
82000 = 70000 (r)^(1-1)
r = 1.1714

Therefore, the function is:
f(x) = 70,000 (1.1714)^(x-1)
Answer 2
Answer:

The function best represents the relationship between x and f(x) will be f(x) = 70,000 (1.1714)^(x-1).

What is a function?

A function is defined as a relation between the set of inputs having exactly one output each.

The general formula for the geometric series to generate the function represents the average annual salary.

a_n = a_0(r)^(n-1)

Or

f(x) = a_0(r)^(x - 1)

The values for the years 2005 and 2006 to get the value of r.

82000 = 70000 (r)^(1-1)\nr = 1.1714

Therefore, the function will be:

f(x) = 70,000 (1.1714)^(x-1)

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Trying to find out what 18 minus one third is and what 12 minus 0ne fourth

Answers

18 - 1/3 = 53/3 or 17 2/3

12 - 1/4 = 47/4 or 11 3/4

:]
so what you do is 18/1 - 1/3 then you find the least common denominator which is 3
then you multiply 18/1 by three and turn it into 54/3
then you do 54/3-1/3 which equals 53/3
answer is 17 2/3


The density of water is 1000 kilograms per cubic meter and the density of ice is about 916 kilograms per cubic meter of 700 kilograms of water and 450 kilograms of ice is combined in a container what is the volume of the water

Answers

Final answer:

The volume of water can be calculated by dividing the mass of water by the density of water.

Explanation:

The question asks for the volume of water when 700 kilograms of water and 450 kilograms of ice are combined in a container. To find the volume of water, we need to subtract the volume of ice from the total volume. The density of water is 1000 kg/m³, so the volume of water can be calculated by dividing the mass of water (700 kg) by the density of water (1000 kg/m³).

Volume of water = Mass of water / Density of water

Volume of water = 700 kg / 1000 kg/m³

Volume of water = 0.7 m³

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Michelle wants to make a long-term investment. She wants to triple an initial investment of$2,000. If she invests at a simple interest rate of 12% per year, approximately how long will it
take her principal to triple?

Answers

Answer:

It will take approximately 17 years

Step-by-step explanation:

Let the initial investment be x

The investment plus the principal yields 3x

The interest is thus 3x-x = 2x

Formula for simple interest is;

I = PRT/100

R is rate = 12%

T is time = ?

x =$2,000 which is the principal

2x = x * 12 * T/100

2 = 12t/100

12t = 200

t = 200/12

t = 16.67 which is approximately 17 years

A helicopter flies 312 miles against the wind in 2 hours; with the wind, it can fly 468 miles in the same amount of time. Find the speed of the helicopter in still air.

Answers

Answer:

78miles/hour

Step-by-step explanation:

If a helicopter flies 312 miles against the wind in 2 hours, the speed of the helicopter in air is expressed as shown;

Speed = Distance/Time

Speed = 312miles/2hours

Speed = 156miles/hr

The speed of the helicopter against the wind is 156miles/hr

If it can fly 468 miles in the same amount of time, the speed during this time at this distance will be;

speed = 468 miles/2hours

Speed = 234miles/hr

The speed of the helicopter in still air = Speed while flying - Speed while against the wind

The speed of the helicopter in still air = 234miles/hr - 156miles/hr

The speed of the helicopter in still air  = 78miles/hour

How can graphing be applied to solving systems of nonlinear equations?

Answers

you can see where the curve crosses the axis

The coordinates of the focus of the parabola −0.25x2 = y − 2 are:A. (0, 6) B. (0, 1)C. (0, −2)D. (0, 3 )

Answers

Answer:

Option B is right.

Step-by-step explanation:

given is an equation of a parabola

-0.25x^2 =y-2\ny=-0.25x^2 +2

-x^2 =4y-8

Vertex is (0,2)

It is open down.

Axis of symmetry is x=0 or y axis

Hence focus will lie on axis of symmetry ie y axis.  

THe parabola has -4a = -4

Hence a = 1

SO focus will lie inside the parabola on axis of symmetry with a distance of a units from the vertex.

i.e. focus would equal = (0,2-1) = (0,1)

Option B is right

The equation is -0.25x^2-x+2=0
The coordinates are ((-b)/(2a);(-\Delta)/(4a))
\Delta=b^2-4ac=1+2=3
The coordinates, thus, are ((1)/(-0.5);(-1)/(-1))=(-2;1)