# Posts by gt

Total # Posts: 37

**Science**

helper t

**Probability**

@cle we are trying to calculate the sum of (1-p)^(x-1)=1+(1-p)^2+(1-p)^4+....+(1-p)^2k=1+sum(1-p)^2k for k=1,2,..... Thus (using the sum of geometric series formula we get => 1+(1-p)^2/(1-(1-p)^2)=1+(1-p)^2/(2p-p^2)=1/(2p-p^2) pY(2)=1/2p*1/(2p-p^2)=1/2*1/(2-p)

**Probability**

@Hamzeh I think the right answer is: 20*(3^6-2*3*(2^6)-3)=1335/5832=0/2289

**Probability**

5) If K=1 then the probability is (1/3)*(3/4)+(2/3)*(1/4) If K=2 then (1/3)*(1/4)*(3/4)+(2/3)*(3/4)*(1/4) If K=3 then (1/3)*(1/4)^2(3/4)+(2/3)*(3/4)^2*(1/4) For K=n then (1/3)*(1/4)^(n-1)(3/4)+(2/3)*(3/4)^(n-1)*(1/4) We are looking for the expected value of K thus the sum(n=1 ...

**math ,geometry**

John is building a fence that is 6 feet high and 18 feet wide to put around his garden. He has two sizes of boards that he can use. One is 2 feet by 6 feet and the other is 4 feet by 6 feet. John can put the boards either horizontally or vertically and he has lots of boards of...

**math**

The squares of a 3×3 grid are filled with non-negative integers such that the sum of each row and the sum of each column is 7. How many different ways can the squares be filled? Details and assumptions The numbers in each grid square does not need to be distinct. ...

**math**

Trahen is building a fence that is 6 feet high and 18 feet wide to put around his garden. He has two sizes of boards that he can use. One is 2 feet by 6 feet and the other is 4 feet by 6 feet. Trahen can put the boards either horizontally or vertically and he has lots of ...

**math**

For every positive integer n, consider all monic polynomials f(x) with integer coefficients, such that for some real number a x(f(x+a)−f(x))=nf(x) Find the largest possible number of such polynomials f(x) for a fixed n<1000. Details and assumptions A polynomial is ...

**SCIENCE,PHYSICS**

According to the legend, Zeus, the king of ancient Greek gods, had the power to create thunderbolts in his hands and throw them at his opponents. Suppose Zeus creates the thunderbolts by bringing his palms very close together and parallel to each other and then inducing equal ...

**SCIENCE,PHYSICS**

A helium ion is at rest in a laboratory when it is put in an electric field of E=2 N/C. An infrared light, of wavelength 2000 nm, is directed towards the ion. The ion is moving towards the source of radiation. After what time in the laboratory frame in seconds will the ion ...

**SCIENCE,PHYSICS**

A boy is spinning on a chair and holding a paper bag so that it is horizontal, and perpendicular to the axis of the rotation. What should be the angular velocity of the boy in radians/second so that the bottom of the bag breaks? Details and assumptions Assume paper breaks at ...

**SCIENCE,PHYSICS**

Exact solutions for many-body problems are rarely encountered in physics. The following problem deals with a non-trivial motion of four charges. Due to the symmetry of the problem it is possible to determine the trajectories of the charges analytically. Four identical ...

**math**

John has a box that contains one red ball and one blue ball. Every minute he reaches into the box and randomly takes out a ball from it (without looking). No matter which ball he took out, he puts it back together with another ball of the same color. Thus, after n minutes, the...

**SCIENCE,PHYSICS**

A truck of mass 3000 kg is harnessed to a trailer (Trailer A) of mass 1000 kg. The trailer is hooked to ANOTHER trailer (Trailer B) of mass 500 kg. The truck begins to accelerate to the right at 1 m/s2, pulling the trailers along. What is the ratio of the force the truck ...

**trignometry**

In the right triangle shown below, the length of AB is 8 units, ¡ÏA measures 60¡ã, sin 60¡ã ¡Ö 0.866, cos 60¡ã ¡Ö 0.5, and tan 60¡ã ¡Ö 1.73. Approximately how many units long is BC...

**trignometry**

In the right triangle shown below, the length of AB is 8 units, ¡ÏA measures 60¡ã, sin 60¡ã ¡Ö 0.866, cos 60¡ã ¡Ö 0.5, and tan 60¡ã ¡Ö 1.73. Approximately how many units long is BC...

**STATISTICS**

Length of Hospital Stays: The average length of “short” hospital stays for men is slightly longer thatn that for women: 5.2 days vs. 4.5 days. A random sample of recent hospital stays for both men and women revealed the following. At ? = 0.01, is there sufficient ...

**medical billing and coding**

In which of the following procedures might a catheter be placed in the heart preoperatively to monitor hemodynamic status? a.pericardiocentesis b.swann-ganz placement c.transeophageal echocardiography d.right-heart catheterization

**medical billing and coding**

which one of the following subcategories of the E/M section has separate codes for new and established patients? a. office or other outpatients services. b. emergency department services. c. initial inpatient consultation. d.hospital observation services

**Medical billing and coding**

what convention in the alphabetic index tells you to look elsewhere before assigning a code? a. abbreviation b.note c.summary d.cross-reference term

**medical billing and coding**

A physician provides an office consultation for a new patient. The history and examination levels are comprehensive and the medical decision making is of high complexity. what is the correct code for this situation?a. 99245 b.99255 c.99254 d.99244

**medical billing and coding**

which ones of the following subcategories of the E/M section has separate codes for new and established patients? a. office ir ither outpatient services b. emergency department services c. initial inpatient consultation d. hospital observation services

**math**

I don't understand it..

**math**

A number has more tens than ones , but the digit in the tens place Is less than 4 . The value of the ones digit is less than 3 . What are the possible numbers ?

**math**

How did you get the 6 ?

**math**

I say 5 but my husband say its wrong ...

**math**

A number has more ones than tens. The value of the tens digit is 50 . The ones digit in the number is less than 7. What are the possible numbers ?

**math**

A number has more ones then tens. The value of the tens digits is 60. What are the possible numbers?

**math**

What is the value of the tens digit in 54?

**math**

I know it don't make sense to me either .. lol. That's why I'm on here ...

**math**

4 children are taken off the chart. 2 children are removed from 4 - legged snake,and the others from duck-billed chicken. how many like duck-billed chicken?

**math**

robby runs for 5 minutes . he walks for 10 minutes . he runs for 7 minutes. he walks another 4 minutes .he runs again for 8 minutes and walk againfor 3 minutes .what is the range of minutes robby runs?

**calculus**

Determine the equations of two lines that pass through the point (1, -5) and are tangent to the graph of y = x^2 - 2.

**math**

Take any two real numbers whose sum is 1(fractions, decimals, integers, etc. are appropriate. Square the larger and add the smaller. Then square the smaller and the larger. What will be true?

**math**

Two numbers are reciprocals of each other. One number is 9 times as large as the other. Find the two numbers.

**math**

Chad was the same age as Shelly, and Holly was 4 years older than both of them. Chad's dad was 20 when Chad was born, and the average age of the four of them is 39. How old is Chad?

**MATHS**

Hi Just checking The area of one face of a cube is 64cm squared What it the total surface area of the cube? DO we do 64 times 6 and the answer is 384 cm cubed? Also it askes what is the volume I do 64 cubed which is 262144 cm cubed ? AM I right ? yes- the total surface area is...