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3 years ago

WILL GIVE BRAINLYNESS

Mathematics

1 answer:

cluponka [151]3 years ago

7 0

Answer:

P(x) = -0.4 $x^{3}$ + 100 $x^{2}$ - 300 $x$ + 500

Step-by-step explanation:

C(x) = 600 $x^{2}$ + 300 $x$

R(x) = -0.4 $x^{3}$ + 700 $x^{2}$ - 600 $x$ + 500

P(x) = R(x) - C(x)

(-0.4 $x^{3}$ + 700 $x^{2}$ - 600 $x$ + 500) - (600 $x^{2}$ + 300 $x$ )

= -0.4 $x^{3}$ + 100 $x^{2}$ - 300 $x$ + 500

This should be the answer.

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Tom's stockbroker offers an investment that is compounded continuously at an annual interest rate of 3.7%. If Tom wants a return

Anettt [7]

Answer:

It'll take 38.3 years to obtain the desired return of $25,000.

Step-by-step explanation:

In order to solve a continuosly coumponded interest question we need to apply the correct formula that is given bellow:

M = C*e^(r*t)

Where M is the final value, C is the initial value, r is the interest rate and t is the time at which the money was applied. Since he wants an return of $25,000 his final value must be the sum of the initial value with the desired return. So we have:

(25000 + 8000) = 8000*e^(0.037*t)

33000 = 8000*e^(0.037*t)

e^(0.037*t) = 33000/8000

e^(0.037*t) = 4.125

ln[e^(0.037*t)] = ln(4.125)

t = ln(4.125)/(0.037)

t = 1.4171/0.037 = 38.2991

t = 38.3 years

7 0

3 years ago

Prove that for every two positive integers a and b that

Aleks [24]

$$(a+b)(\frac{1}{a}+\frac{1}{b}) \ \textgreater \ or = 4$
\\
1+a/b+b/a + 1 \geq 4
$ $$(a+b)(\frac{1}{a}+\frac{1}{b}) \ \textgreater \ or = 4$
$

distributed

choose 1 as your lowest positive integer

plug 1 into a and b

1 + 1 + 1 + 1 $\geq 4$

6 0

3 years ago

Several students measured a 25-mm-long nail and wrote the measurements shown in the table below. Whose measurement had the great

garik1379 [7]

Answer:

Step-by-step explanation:

The decibel level of the sound of a monster truck is

Further explanation:

Decibel is defined as a unit which is used to measure the relative loudness or intensity of the sound.

In the question it is given that the intensity of the sound of a monster truck is watts per square inch.

The formula which is used to calculate the decibel level of a sound is as follows:

Here, represents the intensity of the sound of a monster truck and represents the threshold intensity of hearing at .

The value of the threshold intensity of hearing at is watts per square meter.

This implies that the valiue of is watts per square meter.

The intensity of the sound of a monster is given in unit of per square inch.

The relation between per square inch and per square meter is as follows:

So, the intensity of a monster truck is converted into per square meter as follows:

This implies that the value of is watts per square meter.

Now, substitute the value of and in the equation .

The approximated value of the above equation is as follows:

From the above calculation it is concluded that the decibel level of the sound of a monster truck is .

Learn more:

A problem to complete the square of quadratic function brainly.com/question/12992613

A problem to determine the slope intercept form of a line brainly.com/question/1473992

Inverse function brainly.com/question/1632445

Answer details

Grade: Middle school

Subject: Mathematics

Chapter: Logarithms

Keywords: Logarithms, sound, intensity, power of sound, watts, decibel, decibel level, monster truck, logarithm function, unit, conversion of unit, square inch, square meter.

8 0

3 years ago

Find the percent markup

Aleks [24]

The final sale price would be $662.35

3 0

2 years ago

Read 2 more answers

You collect pennies. you start with one penny and double the number of pennies you have each day for the next 27 days. how many

Rudik [331]

Imagine, at the first day you have only one penny. Then tomorrow you have 2 pennies, next day you have 4 (2x2), next day you have 8 (4x2), next day you have 16 (8x2).... and so forth.

It looks like geometric sequence isn't it? (the ratio between the number of pennies that you have from the 2nd day and the 1st day is 2)

So, by using geometric sequence theorem we can total those pennies until day-27

S (total pennies at day-27) = (1)(2^27-1) / 2-1 = 2^26 pennies

So, you have 2^26 pennies.. a big number of pennies huh?=))

{The formula is: S = a( r^n-1) / r-1
Where:
a= the number of pennies that you've got at the 1st day
n= number of days you spent to collect those pennies)
r= the ratio of the number of pennies}

7 0

3 years ago