Help ASAP pleaseeee!!!!!

Answer:

0.65

Step-by-step explanation:

There are 26 friends on his phone.

There's a total of 40 contacts.

P(Friend) = 26/40

P(Friend) = .65

Step-by-step explanation:

Four and three hundred seventy seven thousandths as decimal number is 0.4377

We have to find derivative of t

[tex]\\ \sf\longmapsto \dfrac{d}{dx}3t^2-12t+4[/tex]

[tex]\boxed{\sf \dfrac{d(x^n)}{dx}=nx^{n-1}}[/tex]

[tex]\\ \sf\longmapsto \dfrac{d}{dx}3t^2-\dfrac{d}{dx}12t+\dfrac{d}{dx}40[/tex]

[tex]\\ \sf\longmapsto 6t-12[/tex]

Now

[tex]\\ \sf\longmapsto 6(8)-12[/tex]

[tex]\\ \sf\longmapsto 48-12[/tex]

[tex]\\ \sf\longmapsto 36[/tex]

I believe I've addressed (1) in another question of yours (24529718).

For (2), the arc length of the curve parameterized by x(t) = 3 cos(t ) and y(t) = 3 sin(t ) over 0 ≤ t ≤ π is

[tex]\displaystyle \int_0^\pi \sqrt{\left(\frac{\mathrm dx}{\mathrm dt}\right)^2 + \left(\frac{\mathrm dy}{\mathrm dt}\right)^2}\,\mathrm dt[/tex]

We have

[tex]\dfrac{\mathrm dx}{\mathrm dt} = -3\sin(t) \text{ and }\dfrac{\mathrm dy}{\mathrm dt} = 3\cos(t)[/tex]

so that the integral reduces to

[tex]\displaystyle \int_0^\pi \sqrt{9\sin^2(t) + 9\cos^2(t)}\,\mathrm dt = 3\int_0^\pi\mathrm dt[/tex]

since [tex]\cos^2(t)+\sin^2(t)=1[/tex] for all t. The remaining integral is trivial:

[tex]\displaystyle 3\int_0^\pi\mathrm dt = 3t\bigg|_0^\pi = 3(\pi-0) = \boxed{3\pi}[/tex]

9514 1404 393

Answer:

Step-by-step explanation:

In order for the total displacement to be zero, the amount of forward displacement must be equal and opposite to the amount of backward displacement. Since the steps are the same length, they must be equal in number.

Half of the 10 steps were forward, and the other half were backward.

  5 steps forward; 5 steps backward.

_____

Additional comment

Math develops from an effort to model the real world. It would probably give you some insight into this problem if you were to physically take some steps to see how many forward and backward you would need to end where you start.

Answer

4

Step-by-step explanation:

9514 1404 393

Answer:

  x = 1.129 (Table I)

  x = 13 (Table II)

Step-by-step explanation:

Log and exponential functions are inverses of each other. For each ordered pair (a, b) in Table I, there could be an ordered pair (b, a) in Table II. (Some corresponding pairs are missing.)

All you have to do here to locate the missing value is to find the corresponding pair in the other table.

  (x, 9) in Table I ⇔ (9, 1.129) in Table II . . . . . . . x = 1.129

  (x, 1.318) in Table II ⇔ (1.318, 13) in Table I . . . . x = 13

Answer:

x = -3/2

Step-by-step explanation:

Remove the absolute value, since you can't solve anything inside. Everything becomes negative due to the negative sign on the outside.

Combine -4 + 3, which results in -1.

Move -1 over to the other side through adding, which results in -3.

Divide -2 by -3, which doesn't go equally, so you leave it.

Go as far as you need for an answer, all will work.

Answer:

5/12

Step-by-step explanation:

1/2 is equivalent to 6/12

1/3 is equivalent to 4/12

The number halfway between 6/12 and 4/12 is 5/12.

Answer:

5/12

Step-by-step explanation:

First we want to have common denominators, and since some of our answers are in twelfths anyways, we might as well go straight to those instead of multiplying to get common denominators of sixths.

Make the denominators of the two fractions we are given into twelfths

(-multiply 1/2 by 6 on the top and bottom to get 6/12, and multiply 1/3 by 4 on the top and bottom to get 4/12.

5/12 is perfectly halway between 6/12 and 4/12 so we have our answer! :)

In an economy system, profit is the financial gain resulting from an exchange.

Profit in layman language means an amount gain for a transaction offered.

Learn more about Profit here

brainly.com/question/15699405

Answer:

47

Step-by-step explanation:

Answer:

is this cold for - Febrery for August this 120 F

Step-by-step explanation:

The Answer is:

an = -15 + 9(n - 1)

Step-by-step explanation:

We can use the Pythagorean theorem to solve for side b:

[tex]c^2 = a^2 + b^2 \Rightarrow b^2 = c^2 - a^2[/tex]

or

[tex]b = \sqrt{c^2 - a^2} = \sqrt{(6\:\text{m})^2 - (4\:\text{m})^2}[/tex]

[tex]\:\:\:\:= 4.47\:\text{m}[/tex]

Answer: 2√5 or 4.47213595

Step-by-step explanation:

Use the Pythagorean Theorem: a^2 + b^2 = c^2  

(a and b are the measures of the legs and c is the measure of the hypotenuse.)

Let's solve for a (the length of the other leg)  

*I hope that m is not a variable and just an abbreviation for meters.

b = 4 m  

c = 6 m

a^2 + 4^2 = 6^2

a^2 + 16 = 36

a^2 = √20

a = 2√5 = 4.47213595

Answer:

x = 7

Step-by-step explanation:

178 =14x - 11 +12x + 7

178 = 26x - 4

182 = 26x

x = 7

Answer:Mark as brainliest please

Step-by-step explanation:

Answer:

To convert m into km we divide a number by 1000

Step-by-step explanation:

To convert from metres to kilometres, divide by 1000 (since there are 1000 metres in each kilometre). To divide a whole number by 1000, put a decimal point at the end of the number and then move it three places to the left.

In general, the difference quotient is [tex]\dfrac{f(x+h)-f(x)}{h}[/tex].

Before we evaluate all of that, we need to find the two top pieces individually.

     [tex]\begin{aligned}\\f(x+h) &= -5(x+h)+8 \\[0.5em]&= -5x-5h+8\\\end{aligned}[/tex]

and

    [tex]f(x) = -5x+8[/tex]

We'll plug that back into the difference quotient:

    [tex]\begin{aligned}\dfrac{f(x+h)-f(x)}{h} &= \dfrac{(-5x-5h+8)-(-5x+8)}{h}\\[0.7em]&= \dfrac{-5x-5h+8+5x-8}{h}\end{aligned}[/tex]

Can you take it from there?

Answer:

400

Step-by-step explanation:

To find the scale factor, you need to find out how much the initial value was multiplied by to get the new value. To do that, you need to divide the new value by the initial value. Make sure the units are the same; don't divide 1000 feet by 30 inches!

[tex]\frac{new}{initial} = \frac{12000}{30}=400[/tex]

Hope this helps!

Step-by-step explanation:

sqrt(50) - irrational. sqrt(50) = sqrt(25×2) = 5×sqrt(2).

sqrt(2) is the prime example of an irrational number (infinite positions after the decimal point, no repeating patterns).

3.45656565656... - rational. although it is infinite, it has had a repeating pattern that allows us to write it as fraction.

0 - rational. as every integer or whole number.

sqrt(4/9) = 2/3 - rational as expressed as fraction.

0.38 - rational. it is a finite decimal number, and can be easily expressed as fraction (like 38/100).

sqrt(81) = 9 - rational. again, as every integer or whole number.

2pi - irrational. pi is a prime example of an irrational number (infinite and no repeating pattern). not possible to write as fraction. Any combination of pi is also irrational.

sqrt(1.69) = 1.3 - rational. finite decimal that we can easily write also as fraction (like 13/10).

sqrt(2/9) = sqrt(2)/3 - irrational, as sqrt(2) is a prime example for an irrational number. any combination with an irrational number is an irrational number.

Answer:

1000 meters below sea level

Step-by-step explanation:

Since the submarine dives at a depth of 4 times 200 meters, then it dives 800 meters.

Sso the submarine now is at 200 meters + 800 meters =1000 meters below sea level.

9514 1404 393

Answer:

Step-by-step explanation:

A spreadsheet is made for this sort of computation. Copy the data to a spreadsheet. Use the "text to columns" feature to separate the data from the dates, and to put the A and B data in different columns.

Then use the spreadsheet built-in covariance and correlation functions to find the values of interest.

In the attachment, we have hidden the middle 50 rows of data to make it easier to select the range of data required for the functions we're using. (In many spreadsheets, you can name a range, so you only need to refer to it by name.)

The formulas we used are ...

  in D2: =COVAR(B2:B61,C2:C61)

  in D3: =CORREL(B2:B61,C2:C61)

_____

Additional comment

Graphing calculators and spreadsheets are essential technology tools. While it can take a bit of study to learn all of the features in depth, you can usually learn enough in a few minutes to be able to make use of these tools to solve many problems. In most cases, videos are available.

The Go.ogle Sheets application works in a browser and is free. That's what was used here. Other free office-type applications (word processor, spreadsheet, and so on) are also available for download to computer, tablet, or phone. (I find it tedious to use these apps on a phone.)

Over [9, 49], the average rate of change of g(x) is

[tex]\dfrac{g(49) - g(9)}{49 - 9} = \dfrac{14 - 6}{49 - 9} = \dfrac8{40} = \boxed{\dfrac15}[/tex]

Over [25, 81], it would be

[tex]\dfrac{g(81) - g(25)}{81 - 25} = \dfrac{18 - 10}{81 - 25} = \dfrac8{56} = \boxed{\dfrac17}[/tex]

Answer:

Rise is the difference in y-coordinates:

Run is the difference in x-coordinates:

The slope is rise/run:

Answer:

7x + 2 = 9x - 1

7x - 9x = -1 - 2

-2x = -3

2x = 3

x = 3/2

Answer:

[tex]let \: 3 - 2x = f(x) \\ we \: want \: find \: f(0) \\ then \: 3 - 2x = 0 \\ 3 = 2x \\ x = \frac{3}{2} \\ thank \: you[/tex]