Please what’s the answer

Answer:

b. normally distributed with a mean of $1200 and a standard deviation of $40.

Step-by-step explanation:

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

Population:

Skewed to the right, mean 1200, standard deviation [tex]\sigma = 400[/tex]

Sample of 100 days:

By the Central Limit Theorem:

Approximately normal

Mean 1200

Standard deviation [tex]s = \frac{400}{\sqrt{100}} = 40[/tex]

The correct answer is given by option b.

The moment generating function of each random variable is;

M(t) = (1/(1 - 1.5t))^(2), t < 2/3

Answer:

SD[X + Y] = 3

Step-by-step explanation:

For ease of differentiation, let's rewrite the M(t) function as;

M(t) = (1 - (3/2)t)^(-2)

Let's find the first derivative of the function;

M'(t) = 3(1 - (3/2)t)^(-3)

To get E[X], we will put 0 for t to get;

E[X] = 3(1 - (3/2)0)^(-3)

E[X] = 3

Now,let's find the second derivative of M(t)

M"(t) = (27/2)(1 - (3/2)t)^(-4)

At,t = 0, we will get E[X²]

Thus;

E[X²] = 27/2

Now, Var[X] = E[X²] - (E[X])²

Var[X] = (27/2) - 3²

Var[X] = 9/2

We are told that the times X and Y are independently and identically distributed. Thus, the sum of their variances is equal to the variance of their sum. This is expressed as;

Var[X + Y] = 9/2 + 9/2

Var[X + Y] = 9

Now,we know that square root of variance is standard deviation. Thus;

SD[X + Y] = √9

SD[X + Y] = 3

Answer:

1.8×120.50, and u shd get the ans

Answer:

7ft/1yd ⋅1yd/3ft

Step-by-step explanation:

To use unit analysis to convert 7 feet to yards

Using unit analysis

1 yard = 3 feet

Hence

3 feet = 1 yard

7 feet = x yard

Cross Multiply

3 feet × x yard = 7 feet × 1 yard

We can represent this as

7 feet/1 yard × 1 yard/3 feet

The correct Option is :

7ft/1yd ⋅1yd/3ft

Answer:

80m2 wtfffffffffffffffffffff

Answer:

n = 80

Hope this helps(:

Step-by-step explanation:

Answer:

8 times 10 minius 26 plus 6 -10 plus 30 is ur anwser lol

Step-by-step explanation:

Answer:

TIK TOK

Step-by-step explanation:

ON THE CLOCK  

Answer:

17 meters

Step-by-step explanation:

According to the Pythagorean Theorem, we can know that the right triangle's a side is Michelle to Tucker (8 meters), and the b side is Jasmine to Tucker (15 meters), and the c side is Jasmine to Michelle. The Pythagorean Theorem equation, the side length of the c side of a right triangle is the length of a side squared plus b side squared and squared root (a^2+b^2=c^2), and so 8^2+15^2=289, and 289 square root is 17, we can know that the distance between Jasmine to Michelle is 17 meters.

Answer:141.4

Step-by-step explanation:

Answer:

[tex]\displaystyle \frac{d}{dx}[e^{2x}] = 2e^{2x}[/tex]

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Calculus

Derivatives

Derivative Notation

Derivative Rule [Chain Rule]:                                                                                 [tex]\displaystyle \frac{d}{dx}[f(g(x))] =f'(g(x)) \cdot g'(x)[/tex]

eˣ Derivative: [tex]\displaystyle \frac{d}{dx} [e^u]=e^u \cdot u'[/tex]

Step-by-step explanation:

Step 1: Define

[tex]\displaystyle \frac{d}{dx}[e^{2x}][/tex]

Step 2: Differentiate

Topic: AP Calculus AB/BC (Calculus I/II)

Unit: Derivatives

Book: College Calculus 10e

Answer:

b⁹

Step-by-step explanation:

When multiplying terms with exponents, you simply add the exponents.

5 + 4 = 9

Answer:

The temperature halfway is -5 degrees farenheit/celcious

Step-by-step explanation:

the difference is 30 degrees

30 / 2 = 15

20 - 15 = -5

-10 + 15 = -5

Hope I helped! Plz mark as brainliest! Have a nice day/night!!! :D

-Lil G

Answer:

45°

Step-by-step explanation:

here's your solution

=> we know that sum of both angle is equal

180°

=> because both angle are co-interior angle

=> let the unknown angle be x

=> so, X + 135° = 180°

=> x= 180 - 135

=> 45°

hope it helps

Answer: Graphed points I used, (-2,0), (0,-2), and (-3,-1)

Step-by-step explanation:

The graph of given function is attached below.

The given function is,

                          [tex]f(x)=-|x+2|[/tex]

We have to draw the graph of above function.

When [tex]x=-2[/tex] ,  [tex]f(-2)=0[/tex]

When [tex]x=-4[/tex] , [tex]f(-4)=-|-4+2|=-2[/tex]

When [tex]x=0[/tex], [tex]f(0)=-2[/tex]

Thus, We have points [tex](-2,0),(-4,-2)[/tex] and [tex](0,-2)[/tex]

The graph of function attached below.

Learn more about the graph of function here:

https://brainly.com/question/24335034

Answer:

12 espero ter

ajudado

isso significa que há 3/4 de meninos e meninas

. Queremos encontrar 3/4 de 16

, podemos fazer isso multiplicando 16 por 3/4

3/4 * 16 = 48/4

48/4 = 12

Existem 12 Rapazes

Step-by-step explanation:

Answer:

Step-by-step explanation:

Answer:

Step-by-step explanation:

y2-y1/x2-x1

-1-(-4)/3-7

3/-4

y=mx+b

For the y coordinate it can be either -4,or -1

-4=3/-4x+b

b=13/4

Answer:

216 sq m

Step-by-step explanation:

Surface area of triangular prism = bh + (s1 + s2 + s3)*L

Where,

b = 6 m

h = 8 m

s1 = 10 m

s2 = 8 m

s3 = 6 m

L = 7 m

Plug in the values

Surface area = 6*8 + (10 + 8 + 6)*7

Surface Area = 48 + 24*7 = 216 m²

Answer:

64

Step-by-step explanation:

Answer:

3/4

Step-by-step explanation:

You can simplify it by looking for what divides into both numbers. The lowest possible number is 3 because it can go into both 9 and 12.

9/3=3

12/3=4

3/4

So we know that 3/4 is equivalent to 9/12, because 3×12=36 and 4×9=36. A simple way to look at how to check for equivalent fractions is to do what is called “cross-multiply”, which means multiple the numerator of one fraction by the denominator of the other fraction. Then do the same thing in reverse.

Step-by-step explanation:

The above given statements can be written as decimals by first writing both quantities in a statement in the same unit.

1. $6.00 to 95 cents:

This is same as $6.00 : 95 cents = \frac{6.00}{95}956.00

Convert $6 .00 to cents to make both quantities be in the same unit.

$1 = 100 cents

$6.00 = 6*100 = 600 cents

\frac{600}{95} = 6.3295600=6.32 (to 2 d.p)

2. 3 hours to 35 minutes:

Convert 3 hours to 35 mins

1 hr = 60 mins

3 hrs = 3*60 = 180 mins

180mins : 35 mins = \frac{180}{35} = 5.14180mins:35mins=35180=5.14 (2 d.p)

3. 42 inches to 2 feet:

Convert 2 ft to inches

1 ft = 12 inches

2ft = 2*12 = 24 inches

42 in:24 in = \frac{42}{24} = 1.7542in:24in=2442=1.75

Answer:

x<20

Step-by-step explanation:

add 4 to the other side to isolate x by adding 4 to 20 to be left with x<20

Answer: -13

Step-by-step explanation:

2-(3^2)+4-3-7 = -13

Answer:

17

Step-by-step explanation:

2x²+4x-7

-6²+(-12-7)

36+(-19)

17

Answer:?

Step-by-step explanation:

Answer:

Pablo has 6 fewer vacation days than Sandra. If s represents the number of vacation days sandra has, how many vacation days does Pablo have?

Answer:

Pigeonhole Principle

Step-by-step explanation:

From series {1,2......2n} ; we need to select 'n + 1' integers.

Even integers series from above series = {2,4,6..........2(n-1), 2n}

Odd integers series from above series = {1,3,5........2(n-2), 2n-1}

So, we can choose only n odd integers from the series. Hence, if we choose n+1 integers, atleast one of them have to be even integer.

Answer:

CA = 13.5

Step-by-step explanation:

tan 64 = CA/6.6

2.05 = CA/6.6

CA = 13.5

53 and 17

Step-by-step explanation:

If you add 53 and 17, you get 70.

If you subtract 17 from 53, you get 36. Hope this helps!