# Posts by Josh

Total # Posts: 1,928

**math**

if the sides are 18 24 and 30 what kind of angle is it

**math**

Testing Laboratory Gloves The New York Times ran an article about a study in which Professor Denise Korniewicz and other Johns Hopkins researchers subjected laboratory gloves to stress. Among 240 vinyl gloves, 63% leaked viruses. Among 240 latex gloves, 7% leaked viruses. At ...

**stats**

A study was made of 413 children who were hospitalized as a result of motor vehicle crashes. Among 290 children who were not using seat belts, 50 were injured severely. Among children using seat belts, 16 were injured severely (based on data from “Morbidity Among ...

**maths\**

Write the ratio 2.5 to 3.15 as a fraction in simplest form

**maths**

i think im suposed to put it ina equation is it like this ? n-10+33 ?

**maths**

Ten subtracted from a number is greater than thirty-three

**stats**

Test the claim given, identify null hypothesis, alternative hypothesis, test statistic, p-value or critical values, conclusion about the null hypothesis and final conclusion Environmental concerns often conflict with modern technology, as is the case with birds that pose a ...

**stats**

test the claim, identify null hypothesis, alternative hypothesis, test statistic, p-value and critical values, and conclusion The health of the bear population in Yellowstone national park is monitored by periodic measurements taken from anesthetized bears. A sample of 54 ...

**stats**

find critical z values, in each case assume normal distribution applies. left tailed test. Alpha= 0.05 Can someone please explain how to do this?

**math**

A medical researcher wants to determine whether male pulse rates vary more or less than female pulse rates. Using the sample pulse rates in Data Set 1 in Appendix B, the male pulse rates can be summarized with the statistics 40=n,69.4=x,11.3=s. For females, the statistics are,...

**AP Biology**

If plants are grown for several days in an atmosphere containing 14CO2 in place of 12CO2, one would expect to find: very little radioactivity in the growing leaves large amounts of radioactive water released from the stomates a large increase in 14C in the starch stored in the...

**Chem -Bob Pursley Please Help!**

So I would like to check some of my answers. I really appreciate any help 1. Which of the following atoms or ions is diamagnetic; Cr Br Mn2+ B C4+ - I said C4+ 2. Which of the following atoms or ions is paramagnetic? C4- S^4+ V^4+ Se2- Ge4+I said V^4+ 3.Which one of the ...

**Biology-ASAP Bob Pursley to the resuce?**

Also...A stock solution of ONPG has a concentration of 25 mM. Add 2.8 mL of buffer, 0.3 mL of enzyme and 0.9 mL of ONPG to a cuvette. What is the final concentration of ONPG in the cuvette? Answer below to one decimal place

**Help Bob Pursley**

Do I not need to write Delta EA = 48 kj/mol

**Help Bob Pursley**

So i am asked to write the equation representing the third ionization energy for Cr, and what I could come up with is Cr^2+(g)->Cr^3+ + e(not sure if I am right). For the second part I am told that the electron affinity of K is 48 kJ/mol, and i am supposed to write the ...

**Chemistry**

So i am asked to write the equation representing the third ionization energy for Cr, and what I could come up with is Cr^2+(g)->Cr^3+ + e(not sure if I am right). For the second part I am told that the electron affinity of K is 48 kJ/mol, and i am supposed to write the ...

**math**

After years of teaching, I can say (with 100% made up certainty) that the average number of questions the typical student can complete per minute is 5.Â If I choose any student at random (I'm looking at you), what is the probability that yo...er that student ...

**math**

I got 12.6% thank you!

**math**

During the winter it snows 3 out of every 10 days what is the probability that it will snow, in any given week 7 days, more than 3 times?

**Physics**

34

**college chemistry **

28.6 grams of SO2 react in the following synthesis: SO2+O2->SO3 How many grams of SO3 could be produced

**Language arts**

The word expectations best describes which situation from “Two Kinds”? Waverly’s reputation as a chess champion the mother’s hopes for her daughter to become a prodigy Mr. Chong’s retirement from teaching piano the daughter’s performance at the ...

**Chemistry**

Is S^(2-) a conjugate base of a weak acid? I think it is not as a congugate base grabs a H^+ ion. am I right?

**Chemistry**

Is S^(2-) a conjugate base of a weak acid? I think it is not as a congugate base grabs a H^+ ion. am I right?

**Chemistry**

Thank you!

**Chemistry**

Order in the increasing value of their polarity? HF NH3 H2O CO2 here i used the scale and got their numbers. HF>H2O>CO2>NH3 am i correct?

**Chemistry**

Actually they are the ones i need a comfirmation.Thank you!

**Chemistry**

How do we order them considering their solubility? CH4 , NH3 , Cl2 , CO2 Ammonia make H bonds with water,which makes it the most soluble. CH4 only have Vander Valls forces. I've heard Cl2 disdolves in considerable amounts in water. So how do we order them? Cl2

**Chemistry**

I meant C6H5-NH2-3-(CH2C*triple bond*CH)

**Chemistry**

Can it reduce the triple bond in, aniline-(CH2C*triple bond*CH) ?

**Chemistry**

Does LiAlH4 perform any kind of a reaction with a triple bond?

**Chemistry**

So this is not common to all reactions? Today morning we had a Chemistry exam and we were given this question. I can't remember the all but, 1)k 2)k/2 3)R 4)R/2 were there in the answers,where k and R are the reaction constant and the reaction rate of the reaction. So in ...

**Chemistry**

Does the reaction rate of a zero order reaction becomes half of its initial value,if the concentration of the reactant becomes half of its initial value?

**Chemistry**

Why is meta-nitro phenol more basic than para-nitro phenol?

**Math**

1-cotx=1-(cosx/sinx)= 1 - ((1/2)(cot(x/2))) - ((1/2)(sec(x/2))) how to simplify this inside "ln"? can we substract them adding ln(loge) infront of them?

**Math**

How do we integrate ln| 1 - cot x | 0-pi/4?

**Chemistry**

Thanks!

**Chemistry**

Can't we except a white percipitate(ethanoic acid),when ethanoyl chloride is dissolved in water???

**Maths**

Thanks Steve!

**Maths**

a and b are perpendicular vectors.a=(2i+3j) and b=ti+dj(d>0 and i and j are unit vectors) and |b|=1 Find t and d? I know we have to use the cross product here. a.b=|a||b|*cos(?/2) (2i+3j)(ti+dj)= ?13*1*0 2t+3j=?13*0 How do we find t and d?

**Chemistry**

What makes the strongest cation in water? Al Na Fe K Mg I know that the OH^- ions from water are enough for the Al(OH)3 and Fe(OH)3 precipitates to appear and we've been taught that K,Na compounds are soluble in water too. And Mg(OH)2 needs a higher OH^- concentration to ...

**stat**

Use table A - 2 to find the probability of a randomly selected value is between 0.7 and 1.98.

**stats need help**

If all the values in a data set are converted to z-scores, the shape of the distribution of the z-scores will not be the same as the distribution of the original data. True or False?

**Help me with math**

Find the variance for the given data. Round your answer to two decimal places. 5.0, 8.0, 4.9, 6.8, and 2.8

**Math need help**

Identify the type of observational study. Researchers plan to collect data by interviewing patients who have cardiac by-pass surgery at several local hospitals beginning in January 2014. Cross-sectional Retrospective Prospective None of these

**math**

i am a 3 digit number. my ones is one more than my tens. my tens digit is 0. my hundreds is 4 more than my ones. what number am i?

**government**

According to Journalism(.)org, most Americans get their political news from cable television. 24% of Americans reported that cable tv news was their main source of political information, followed by 16% saying social media. Only 3% and 2% of Americans said they got their news ...

**Chemistry**

An unknown monoprotic acid has a pH of 2.87. Is this acid weak or strong if 22.32 mL of 0.112 M NaOH is required to titrate 25.00 mL of the acid? If the acid is weak, calculate its Ka. Answer is Ka = 1.8 x 10^-5, but I don't know how to get there. Any help would be ...

**Chemistry**

A 25.00 mL sample of a soft drink was titrated using 12.10 mL of 1.50 M NaOH. Given that the soft drink's monoprotic acid has a Ka value of 2.8 x 10^-5, predict the pH of the soft drink. I know that the answer is pH 2.85 (our practice questions have an answer key) but I&#...

**Social Studies**

How can a free press hold the government accountable? a.hosting opinion panels** b.offering prior restraint c.accessing classified info d.summarizing government actions

**math**

When baking a cake, you have a choice of the following pans: a round cake pan that is 2 inches deep and has a 7 inch diameter a 6 inch × 9 inch rectangular cake pan that is 2 inches deep a. Which of these pans has the larger volume? Justify your answer. b. Excluding the ...

**math**

A man travels 12km due north, then 5km due east and then back to the starting point on a straight road. What is the total distance traveled?

**Algebra**

Enterprise chargesa flat fee of $500 and an additional $2.45 per mile hertz charges a flat fee of $70 and an additional $1.25 per mile driven write an equation to represent the cost, y, of driving x miles with enterprise.

**Calculus**

I am given the true of false question: If f(x) is continuous and 0<=f(x)<=1 for all x in the interval [0,1], then for some number x f(x)=x. This seems intuitively true, but I'm not sure. All help is greatly appreciated.

**math**

How much money must Andrea invest for 2 years in an account that earns an annual simple interest rate of 8% if she wants to earn $500 from the investment?

**MATH**

The Bishop's Peak 4-H club is having its annual fundraising dinner. Adults pay $25 apiece and children pay $10 apiece. If the number of adult tickets sold is twice the number of children's tickets sold, and the total income for the dinner is $1,800, how many of each ...

**Science**

How many grams of Sodium chloride are in 53.2 g of solution that is 0.50% by mass sodium chloride?

**Maths**

So route one will be 52/60 which equal 0.86 recurring and route 2 would be 0.86. So which is faster - is it router 2 and by how much? Thanks.

**Maths**

Route 1 - 52 miles at 60mph. Route 2 - 43 miles at 50mph. Which route is faster and by how much? Thanks.

**science**

A 50-kg object moving at 12 m/s has a momentum of 600 kg ´ g m/s. What is the mass of an object, moving at 4 m/s that has the same momentum?

**Political Science**

Is it better for legislators to answer to party leadership or to the median voter? Why or why not? Just pros and cons of both would be of immense help to begin research to answer this prompt

**physics**

Consider a wire in the shape of a semi-circle of radius R, with a total positive net charge Q vistributed over the wire uniformly. Divide the wire into at least 8 equal point-like “chunks” of charge. Then, for each “chunk,” sketch (on the same diagram) the ...

**physics**

If a segment of wire has a net charge (uniformly distributed), and then its length is increased by 50%,by what factor has its charge density changed? If the original charge was 10.0 nC, how much charge must then be added to restore the wire’s original charge density?

**physics**

What do you mean when you say NO?

**physics**

Consider a wire in the shape of a semi-circle of radius R, with a total positive net charge Q distributed over the wire uniformly. Divide the wire into at least 8 equal point-like “chunks” of charge. Then, for each “chunk,” sketch (on the same diagram) the ...

**physics**

How is it 3/2 the length?

**physics**

If a segment of wire has a net charge (uniformly distributed), and then its length is increased by 50%,by what factor has its charge density changed? If the original charge was 10.0 nC, how much charge must then be added to restore the wire’s original charge density?

**physics**

AN OCEAN WAVE TRAVELS 18.8 METERS IN 5.1 SECONDS. THE DISTANCE BETWEEN THE 2 NEAREST WAVE CREST IS 4.1 METER. WHAT IS THE FREQUENCY?

**physics**

Evaluate the following statement (T/F/N), explain: If you reduce by half the distance between two point charges, you double the magnitude of electrical force that each exerts on the other.

**Science. HELP!! **

If you decrease the frequency of a wave, how does the velocity change?

**social studies**

calm down you dont have to wright a essay i forgot the s

**social studies**

Which set correctly identifies the features shown on the map 1. A Andes Mountains. B Pamps 2. B Atacama Desert C Pamps 3.A Atacama Desert D Andes Mountains 4. C Andes Mountains D Pamps i think it is 1 im not sure

**Science! NEED HELP URGENT**

What effect does amplitude have on velocity?

**MATH URGENT HELP!**

you put 5,000 in an account that is compounded quarterly. the annual interest rate ,r, is 4%. how much will be in the account after 10 years?

**word problems**

Thank you

**word problems **

In certain deep parts of oceans, the pressure of sea water, in pounds per square foot, at a depth of d feet below the surface, is given by P=16+7d/11 If a scientific team uses special equipment to measures the pressure under water and finds it to be 646 pounds per square foot...

**Math**

Name the population and the sample in these two 1) The number of roadrunners born within a 50-mile radius of lubbock 2) The cars traveling at a 75 kilometers per hour between beaumont and lufkin

**math help ASAP**

NO SORRY NOT B I MENT D

**math help ASAP**

Rico made a function table to illustrate the rate he charges for mowing lawns. Complete the table. Then write a function rule for the function. (1 point) ( ) = blank Hours (h) 1 2 3 4 5 Earnings (E) ( ) ( ) ( ) $22.00 $27.50 a. $5.75, $11.50, $17.25; E = 5.75h b. $6.00, $12.00...

**Math **

In a Canadian Football League game, the path at one particular kick-off can be modelled using tge function h(d)=-0.02d^2+2.6d-66.5,where h is the height of the ball and d is the horizontal distance from the kicking team's goal line,both in yards. A value of h(d)=0 ...

**english**

oh well i think it is 4

**english **

which set of words, below could be used to describe the disperal of seeds to a new region 1.wings, legs, migration 2.invasive, exotic, continental drift 3.biogeography, adaptation, survival, 4.wind, water, animal feces and if you know the rest can you help me

**Physics**

The lecturer with a monotone voice of 440 Hz and you are both 2m away from the long, smooth and tall wall.You will hear sound that comes directly to you from the lecturer along with sound that comes back from the wall on it’s way to reaching you.You need the path here ...

**Math**

Country A has a population of 102.4 million people and total land area of about 150.7 thousand square miles. What is the population density (the # of people per square mile?

**math**

a boy noticed that the end of the 3.5m shadow, the top of his head and the top of a 28m tall tree are in a straight line. if he is 1.5m tall, how far is he from the tree?

**Physics**

1) Imagine you were to walk 12 km 25 degrees North of East. If you could only walk south and west to get back to the point that you started from, how far would you have to walk? 2) An airplane has a velocity of 70 m/s [50 degrees W of N] with respect to the air. A person on ...

**Stats**

45 and 141 seconds

**mrps**

Before taking her final test, Tammys mean was 88% If she scores 68% on the final, her mean will be 86%. However, if she scores 98% on the final test, her mean will be 89%. How many test will Teresa takes in total.

**Math**

The average atomic weight of all elemons in the periodic tabe is 134.355 unidied atomic mass uints.

**english **

Except for Ronnie and ______, everyone was on time. him**** he Between you and ___, I know the answer to the mystery I**** me Leave your message with Ms. Hirioka and ______ me I**** It was Geraldine Ferraro______ ran for vice president in 1984. who*** whom with _______ did you...

**Calculus**

What is the largest possible product of two non-negative number whose sum is 1

**calculus**

oh I'm sorry the problem actually say two non-negative numbers I misread the problem

**calculus**

What is the largest possible product of two negative number whose sum is 1?

**calculus**

is my answer to this question correct A spherical balloon is losing air at the rate of 2 cubic inches per minute. How fast is the radius of the ballon shrinking when the radius is 8 inches. Answer= .0024

**calculus**

A spherical balloon is losing air at the rate of 2 cubic inches per minute. How fast is the radius of the ballon shrinking when the radius is 8 inches.

**Algerbra**

Mark has made a clay model. He will now make a clay statue that is mathematically similar to the clay model. The model has a base area if 6cm^2. The statue will have a base area of 253.5cm^2. Mark used 2kg of clay to make the model. Clay is sold in 10kg bags. Mark has to but ...

**Surfaces of cones **

The diameter of the base of the cone is 24x cm. The height of the cone is 16x cm. The curved surface area of the cone is 2160pi cm^2. The volume of the cone is V pi cm^3, where V is an integer. What is the value of V. Answer is cm^2. Thanks a lot.

**physics**

a cannon of mass 400kg fires a shell of mass 20kg. if the shell leaves the cannon at 300ms^-1, with what velocity does the cannon recoil? an a- particle is emitted from a polonium nucleus at a speed of 1.8 x 10^7 ms^-1. the relative masses of the a- particle and the remaining ...

**5th grade math**

rtr

**Math**

Kevin takes 8 hours to mow 6 lawns. At this rate, how many lawns could be mowed in 32 hours