Mathematics College

Brain weights are normally distibuted with mean 1400.48 grams and standard deviation 106.33 grams. Find the 80th percentile of this distribution.

Answers

Answer 1

Answer:

The 80th percentile of the distribution is 1,490.01 grams

Step-by-step explanation:

Here, we want to find the 80% of the distribution

80% means 80/100 = 0.8

We need to get the z-score equivalent to 80th percentile;

This is equal to 0.842

Mathematically;

z-score = (x - mean)/SD

we want to calculate x here;

0.842 = (x - 1400.48)/(106.33)

106.33(0.842) + 1400.48 = x

x = 1,490.00986 which is 1,490.01 grams to 2 decimal places

Related Questions

which point represents the vertex of the marked angle? see photo above

Answers

Answer:

Step-by-step explanation:

A vertex is where two lines intersect

B is the correct answer.

is 0 a natural number?

Answers

Answer:

No 0 is not a natrual number but it is a whole number.

Step-by-step explanation:

What is the slope of the following equation?

Answers

Answer:

-5

Step-by-step explanation:

the slope is the one conected to the x

Which of the following values is the slope of any line parallel to 5x + 7y = 6?
A. 7
B. 5
C. -7/5
D. -5/7

Answers

Answer:

Step-by-step explanation:

Find the measure of the angle indicated in bold.

Answers

Answer:

35º

Step-by-step explanation:

20x + 5 = 24x - 1

x = 1.5

35° is the correct answer

The sum of two consecutive integers is 26. What are the integers? Question does not specify even or odd consecutive integers. Please HELP!

Answers

X is some integer

X+1 is the consecutive integer
Consecutive interferes are numbers like { 5,6,7 } or { 11,12,13 }. They are numbers that follow after one another

We sum x and x+1 getting 26 which means
x+(x+1)=26

2x+1=26

2x=26-1

2x=25

x=25/2

x=12.5

We made x an internet but 12.5 isn’t a integer so there are no solutions to the first integer equation.
So there are no consecutive integers that add up to 26.

If your teacher said consecutive even integers then your equation would be

x+(x+2)=26

2x+2=26

2x=24

x=24/2

x=12

And we can see that x=12 and x+2=12+2=14 add 12+14=26

Thar only applies if your teacher wrote consecutive even integers. With that even left out there are no solutions

Solve 2x + 6y = 11, solve for y

Answers

Answer:

y= 11-2x / 6

Step-by-step explanation:

Katie ran four miles she ran at a rate that was 1.1 miles per mile slower than Jasmine Jasmine ran at a rate of 8.4 minutes per mile for how many minutes did Katie run? Explain how you determined your answer.

Answers

Answer:

Katie spent 29.2 minutes

Step-by-step explanation:

I hope this helps!!!

Answer:

29.2 minutes

Step-by-step explanation:

If Jasmine ran 5 miles in 42 minutes. Katie ran 4 miles. She ran at a rate that was 1.1 minutes per mile slower than Jasmine. For how many minutes did Katie run? Explain how you determined your answer. So basically When you run slower you subtract so 8.4 minus 1.1 is 7.3. And then multiply it by 4 and get 29.2 You can check your answer by dividing 29.2 by 7.3

the image of the point (-8, -5) under a reflection across the x-axis is (8, -5)
True or false

Answers

False hope this helps :)

false because it should be (-8, 5)

Write the equation that describes the line in slope
intercept form:
slope 8, y intercept = 2

Answers

Answer:

y = 8x + 2

Step-by-step explanation:

please mark me as brainlest

What’s the factored form of f(x)=x^3-5x^2+4x

Answers

First you factor out x because it is a common factor in all of the terms.

f(x) = x(x^2 - 5x + 4)

Then factor the quadratic

f(x) = x(x - 4)(x - 1)

Please help me quickly! 3.5.2 Practice for income tax

Answers

Answer:

$15,475

Step-by-step explanation:

Mr. and Mrs. Jones make a combined $92,400 in taxable income. Looking at the table, their income is over $67,900 but not over $137,050.

So, the tax is $9,350. But, it also includes 25% of the amount over $67,900.

So,

$92,400 - $67,900 = $24,500

0.25 × $24,500 = $6,125

$9,350 + $6,125 = $15,475

Hope that helps.

4 (2+6)+4-3 (9-7))))))

Answers

Answer:

the answer is 10

Step-by-step explanation:

i hope it helped you!

I’m lost. Can you help me?

Answers

Answer:

yes i can ❤ help you you. just say.!

Yessir what ya need?

A shirt is on sale for 25% off, and the total comes out to $15. What is the original price?

Answers

The total price is equivalent to 75% of the price it was bought for. Divide the selling price by 75 and multiply by 100:

(15 / 75) x 100 = $20

The shirt was initially $20

If the average gas price was 3.85 per gallon how much did you spend on gas and if you used 25 gallons of gas?

Answers

answer is 96.25 might be the answer

Answer:

Step-by-step explanation:

96.25 for 25 gallons

3.85 times 25 and that's your answer

Determine if the ordered pair (−2,1) is a solution of 2x−y=−3.
yes or no

Answers

Answer:

no, it is not a solution

Step-by-step explanation:

2x−y=−3.

insert the x value and y value ---> x= -2 y= 1

2(-2) -(1)= -3

simplify

-4-1=-3

-5= -3

Solve the equation. Then check your solution.
A-1/2=3/5

Answers

Answer:

B: 1 1/10

Step-by-step explanation:

Step 1:

a - 1/2 = 3/5 Equation

Step 2:

a - 5/10 = 6/10 Find the common denominator

Step 3:

a = 4/10 + 6/10 Add 5/10 on both sides

Answer:

a = 11/10 or 1 1/10

Hope This Helps :)

Identify the given random variable as being discrete or continuous. The number of phone calls between New York and California on Thanksgiving day Group of answer choices Discrete

Answers

Answer:

Discrete

Step-by-step explanation:

Given

Number of phone calls between two cities on Thanks giving day

Required

Discrete or Continuous

Number of phone calls can be represented as thus:

0, 1, 2 , 3 , 10, 20, 100 or any other positive whole numbers

Only discrete data take form of the above.

Hence, "Discrete" answers the question

The given random variable is discrete and this can be determined by observing the given data.

Given :

The number of phone calls between New York and California on Thanksgiving day.

The following steps can be used in order to determine the given random variable as being discrete or continuous:

Step 1 - According to the given data, the number of phone calls between New York and California on Thanksgiving day.

Step 2 - So, the total number of calls on thanksgiving day may be 0, 2, 6, 9, 15, 100, 115, or whole positive number.

Step 3 - So, from the above steps, it can be concluded that the given random variable is discrete.

For more information, refer to the link given below:

https://brainly.com/question/17429689

Carlos purchased 8,000 shares of Baller, Inc. stock. In December, Baller, Inc. declared a dividend of $45,000 at $3.50 per share. What were the total outstanding shares of Baller, Inc. stock when they declared dividends?
A)11,882
B)12,857
C)10,492
D)11,301

Answers

Answer:

i dont knwo bat i knaow the answer is ç

I believe the answer is C

Laila bought 20 strawberries. She ate 1 strawberry. What percentage of the strawberries did Laila eat?

Answers

Answer: 5%

Step-by-step explanation: 100%÷20=5%

Answer she ate 5 percent of the strawberries

How many grams are in 1.204 x 10 24 atoms lithium

Answers

Answer:

We have:

1.204x10^24 atoms of lithium.

The weight of one atom of lithium is: 6.941 atomic mass units.

And we know that:

1 atomic mass unit = 1.661x10^(-24)g

Then the mass of one atom is 6.941 times 1.661x10^(-24)g

m = 6.941*1.661x10^(-24)g = 1.153x10^(-23)g

Then the mass of 1.204x10^24 atoms is 1.204x10^24 times 1.153x10^(-23)g

M = 1.204x10^24 *1.153x10^(-23)g = 1.388x10^(24 - 23) g

M = 1.388x10^1g = 13.88 g

Then 1.204x10^24 atoms of lithium wieght 13.88 grams.

A box with 3 pounds of chocolate costs $54.
what is the unit rate per pound

HELP ME PLEASE ASAP

Answers

Answer:

$18 per pound

Step-by-step explanation:

3 pounds/3 = 1 pound

54/3=18

18 is the unit rate
Just do 54/3=18

Johanna rode her bike 7 miles to a lake . She rode 3/4 of the distance to the lake before lunch

Answers

Answer:

The answer would be 5.25 miles :)

What I did was I took 3/4 and made it into its decimal form which is 3/4. I then times it by 7 to get 5.25.
5.25 miles is your answer.

Find the next two numbers in the pattern.
5, −20, 80, −320, …

Answers

Answer:

-12

Step-by-step explanation:

what is 33 devided by 78

Answers

0.4230769230769

And it’s spelt divided

Question:

What is 33/78

What is 78/33

Step-by-step explanation:

Well if you think about it 33/78=0.42307692307

Well if you think about it 78/33=2.36363636364

Answer:

Those big numbers :p

A. Similar - AA
B. Similar - SSS
C. Similar - SAS
D. Cannot be determined

Answers

It’s A
because they are the same AA

Select the correct scientific notation form of this numeral. Can someone help me with this

541

5.0 × 10 2
5 × 10 2
5.41 × 10 2
5.4 × 10 2

Answers

Answer:

it would be 5.41 x 10^2

Step-by-step explanation:

the reason it would be this is because when you have it ^2 you love the decimal that many places the same goes for the number was negative then you would move it backwards.

Answer:

The answer is 5.41 × 10^2

Step-by-step explanation:

To make sure the answer is right, picture a decimal on the right of the 1 in the numeral. Then, picture it going to the left until it's next to the 5. Since it moved twice, the exponent is 2 and the decimal is 5.41. Hope this helps!

Darius filled up his gas tank with 24 gallons of gas. For each mile that he drives, he uses 0.06 gallons of gas. How may gallons of gas are left in the tank after driving 240 miles?

Answers

Answer:

9.6 gallons

Step-by-step explanation:

Step one:

Given that the capacity of the gas tank is 24 gallons.

we know that 1 mile will consume 0.06 gallons

therefore x miles will consume 0.06x gallons.

the consumption for any distance is given as

0.06x gallons.

Step two:

if x=240 miles

then the gallons consume will be

0.06(240)=14.4 gallons

Step three:

the remaining gallons of gas in the tank will be

24-14.4=9.6 gallons

The reamining gallons will be 9.6 gallons

at a simple annual interest rate of 4.5 percent, haw many years will it take Sam to earn 135 dollars on an original account of 1,000

Answers

9514 1404 393

Answer:

Step-by-step explanation:

The simple interest formula is useful here:

I = Prt

where I is the interest earned on principal P invested at rate r for t years.

Filling in the given information, we can solve for the unknown.

135 = 1000·0.045·t

135/45 = t = 3

It will take 3 years for Sam to earn $135 on his account.

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