# Posts by sandra

Total # Posts: 1,145

**algebra**

describe what the graph of interval {-4,19}

**Physics**

Stephanie is right, it's 2.25

**math**

Explain how multiplication can help you find 7+7+7.

**math**

200

**math**

A hiker travels N 33 degrees W for 15km, then turns 90 degrees and walks 12km in the direction S 57 degrees W At that time how far is the hiker from his starting point? What is his bearing from his starting point?

**chemistry**

By reference to Molecular orbital Theory and giving the appropriate MO diagrams explain why the bond in N2 is very strong short (bond dissociation entalpy 945 kjmol-1,bond length 109.8 pm) while that in O2 is weaker and longer (bond dissociation entalpy 497 kJ mol-1 bond ...

**chemistry**

By reference to Molecular orbital Theory and giving the appropriate MO diagrams explain why the bond in N2 is very strong short (bond dissociation entalpy 945 kjmol-1,bond length 109.8 pm) while that in O2 is weaker and longer (bond dissociation entalpy 497 kJ mol bond length ...

**Pre-Calc-Please check answer**

Thank you-I see where I made the mistake Funny!! I like that!

**Pre-Calc-Please check answer**

Should be sigma sign not signma sign

**Pre-Calc-Please check answer**

1.Write 4+6+8+10 in sigma notation: I came up with sigma in the middle 3 on top j=0 on the bottom 2n+4 to the right of the signma sign 2. Find the 10th term of the sequence -1/5,-1/20,-1/80 this was a geometric sequence so I said a(subscript10) = -1/5*1/4^(10-1) =-1/5*(1/4)^9...

**Pre-Calc-Please check answer**

1.Write 4+6+8+10 in sigma notation: I came up with sigma in the middle 3 on top j=0 on the bottom 2n+4 to the right of the signma sign 2. Find the 10th term of the sequence -1/5,-1/20,-1/80 this was a geometric sequence so I said a(subscript10) = -1/5*1/4^(10-1) =-1/5*(1/4)^9...

**Pre-Calc-Please check**

1.Write 4+6+8+10 in sigma notation: I came up with sigma in the middle 3 on top j=0 on the bottom 2. Find the 10th term of the sequence -1/5,-1/20,-1/80 this was a geometric sequence so I said a(subscript10) = -1/5*1/4^(10-1) =-1/5*(1/4)^9 = -1/5*1/2621444 = -1/1310702

**chemistry**

Suppose that the following solution is diluted by adding the indicated amount of water. Calculate the new concentration of 225 mL of 3.02 M HCl; 375 mL water added

**math**

Would you use mental math to solve 2984+1997+406? Explain?

**Math**

Explain how you can estimate to tell whether 433-147=286 is reasonable.

**Math**

Explain how you can estimate to tell whether 433-147=286 is reasonable.

**math**

Patricia estimated that 439 - 186 would be close to 300. Do you agree? Explain and solve the problem.

**Math**

thank you

**Math**

Heidi says 381= 2 hundreds, 7 tens, 11 ones. Do you agree? Explain.

**Economics**

If a firm temporarily suspends production due to matters of financial loss, is a shutdown of business, if a firm opts to “go out-of-business” primarily due to continual financial losses the business is inoperable and no longer conducting transactions. My firm ...

**math**

If you estimate to the nearest 5 or 10 it is easier to add.

**Chemistry**

What is the molecular weight of 30% aqueous nitric acid?

**CHEMESTRY**

Which of the following solutions would have the lowest boiling point? A.1.0 M NaCl B.2.0 M NaCl C.3.0 M NaCl D.4.0 M NaCl

**psychology**

The testing company has hired qualified people in the field to administer the new test bank to subjects of different ages and ethnic backgrounds.They need a sizeable number of scores from inner city,urban,and country/small town subjects.Their goal is to gather suffiecient data...

**Math**

Explain why one column in a hundredths grid is equal to one column in a tenths grid?

**math**

THANK YOU

**math**

hector music teacher requires 450 min of practice each month. Hector practiced 239 min the first three weeks this month. Estimate how many minutes he has left to practice.

**IT**

What steps would you take in diagnosing an application that has been changed from its original state? How does this affect the level of support required to facilitate Microsoft® Access® users? I need this for my college paper. Thanks

**IT**

What steps would you take in diagnosing an application that has been changed from its original state? How does this affect the level of support required to facilitate Microsoft® Access® users?

**math**

Is it reasonable to say the sum of 146 and 149 is less than 300? Explain.

**physics**

no, that's all he posted.

**physics**

A car is connected to a tree by a length of rope tied tightly. A 115 pound woman steps in the middle of the rope causing it to deflect by 15 degrees.

**math**

Jonah wants to add 43+19. He added 43+20. What step should he take next?

**Math**

Thank you

**Math**

Miles says 47+36 is the same as 50+33. Is this reasonable? Explain.

**statistics**

Considering that a researcher can test at the <p = .05 (95%), p = .01 (99%), or p = .001 (99.9%) level for statistical significance, how would you use these three levels in relationship to risk to patients in implementing the decisions of your research?

**Math 3 grade**

40+3

**HRM/498**

One paragraph identifying and describing the diversity consideration and the impact it is having on one or more aspects of a company's strategic HR planning process.

**HRM/498**

One paragraph identifying and describing the ethical consideration and the impact it is having on one or more aspects of a company's strategic HR planning process.

**Math**

9 days x 1/2 hour = 9/2 Now divide 9/2 = 4 1/2 Answer: 4 1/2 (improper fraction) 9/2 ( mixed fraction)

**math stats**

four times the difference of -19 and 3 amounts to -88

**physics**

a 10kg wood ball hangs from a 1.1 m long wire. The maximum tension the wire can withstand without breaking is 600N. a .9 kg projectile traveling horizontally hits and embeds itself in the wood ball. What is the largest speed the the projectile can have before the cable breaks

**algebra**

jopfjqopegfjq

**Anatomy**

I have a question: The process that traps solids in the cell membrane and brings them into the cell is which of the following:I'm almost positive it i pinocytosis, correct? pinocytoais phagocytosis ion pumps

**Chemistry**

Cryolite, Na3AlF6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. Balance the equation: Al2O3(s) + NaOH(l) + HF(g) -> Na3AlF6 + H2O(g) If 14.0 kilograms of Al2O3(s), 57.4 kilograms of NaOh(l), and 57.4 kilograms of HF(g) react ...

**STATS**

The top selling Red and Voss tire is rated 70,000 miles means nothing. In fact, the distance the tires can run until they wear out is a normally distributed random variable with a mean of 82,000 miles and a standard deviation of 6,400. a. What is the probability that a tire ...

**science**

The making of the nuclear reactor was an advance in

**Biochem**

Desribe the preparation of 2.00 L of 0.100M pH 9.00 glycine starting with the sodium chloride salt of zwitterionic glycinhe and 1.00M NaOh. If a reaction that generated 2.00 mmoles of base were carried out in 100 mL of the above buffer, what would be the final solution pH? ( ...

**algebra**

Find the length of each kind of shark. The white Shark is 18ft long. The oceanic whitetip shark is 2/3 the length of the tiger shark.

**Spanish**

Thank you for answering

**Spanish**

So I didn't mean to put Te llamo Isabel as the usual way, I meant to say Me llamo Isable is the way I think we put it because that wouldn't involve reflexive in this case, I don't think.

**Spanish**

Hi we just relexive verbs and I'm already stuck Please check this answer ¿Cómo te llamas? 1. Me llamas Isabel 2.Te llamas Isabel 3.Te llamo Isabel 4.Me llamo Isabel Would it be "Me llamo Isabel?" because Te llamo Isabel is the usual way Also Te ...

**Pre-Calculus**

I can answer my own question-NO yours makes more sense. Its the first day of these so I'm still alittle confused. Thank you for helping

**Pre-Calculus**

I came up with (x+5)(x+6) = 0 x^2 - 11x + 30 = 0 Would that also be correct? Thank you for helping

**Pre-Calculus**

I need to write a polynomial of the smallest degree with roots 5 and 6 and the answer can't have parentheses. Can someone point me in the right direction. I have several of these to do.

**physics**

You are driving south on a highway. Then, without changing speed, you round a curve and drive west. Do you accelerate?

**physics**

You are driving north on a highway. Then, without changing speed, you round a curve and drive east. Does your velocity change?

**maths**

the diameter of a wheel is 84cm? How far it travels in one turn?

**ETH125**

what changes has the US made to certain polices concerning the treatment of Muslims and Arabs?

**geology**

How do oceans regulate climate?

**Math**

Suppose the interest rate is 8% APR with monthly compounding. What is the present value o an annuity that pays $90 every 6 months for 5 years?

**Med terms**

I find nine(9)words, but I need ten (10) I do not know what I am missing. But I am missing a word and place my finger on it. Dob chronic obstructive pulmonary disease (COPD) aphonia sputum apnea days dyspnea paroxysm ventilator So what is I missing here?!

**educational statics**

how often does the university admit an exception student with a SAT score of x =700 or above Asample of 36 students (N)- 36 were randomly selected with mean (=11,and standard deviation (x=12. the sample mean score X=9.

**educational statics**

the average SAT score at a local university is (=60, and standard is (x=50. Assume that the university SAT score has a normal distribution convert a student score x=700 into z score

**algebra 2**

1) In the general second-degree equation Ax^2 + Bxy + Cy^2 + Dx + Ey = F = 0, what is the discriminant and what does it tell you about the graph of the equation? 2) Which terms in a general second-degree equation (Ax^2 + Bxy + Cy^2 + Dx + Ey = F = 0) are used to find the ...

**stats**

For a normal distribution where mx= 80 and sx= 10, the distribution model fits well to test scores of N = 20000 students.

**business communication**

A~handwritten applications

**MATH**

3 PIZZAS WERE EACH CUT INTO 8 PIECES. TEN OF THE PIECES WERE EATEN FOR LUNCH

**Pre-Cal**

From a point 50 feet in front of a church, the angle of elevation to the top of the steeple is 48 degrees. Find the overall height of the church and steeple.

**algebra**

a number is represented by the variable x at least is represented by the ≥ symbol and the last part of the inequality is 15 so the answer is x ≥ 15

**math**

what is 25 more than 5 times and number and x

**Mathematical for Educators 1**

Jim bought two shirts that were originally marked at $40 each. One shirt was discounted 20% and the other was discounted 25%. The sales tax was 4.5%. How much did he spend in all

**English**

what is the simple predicate in the sentence, I could hear the wind blow through.

**math**

What are the steps to the solution for this problem? What is the difference between 330 and half n equals 114?

**PENN-FOSTER**

that not what i said you are not making it clearer you are putting words in my mought i look at some one else question she was asking for the anser not help that the one back you should be on not mine because like i said i did not know about this my daughter told me they can ...

**PENN-FOSTER**

like i said this is my first time on this web page so i did not understand she said let ask them the question because they will help you with the ones you having trouble with i did not just want the anser i taught someone who took it already could explane it better let not ...

**PENN-FOSTER**

ok i did not know my daughter just told me to go to this web sit and ask any way thank you i did not want th anser i said i was having problems with does questions

**PENN-FOSTER**

i am not beeing rude i am just not to good with the computer you are been rud i would i would like to know your name and i am not cheating every body bask questions that wat the web site is for thank you

**PENN-FOSTER**

HI I AM NOW DOING FACILITIES AND STAFF BUT I AM HAVING SOME STRUGGLES WITH NUMBERS 8,9,10, 11,12 I AM ASKING SOME ONE WHO TOOK THIS CLASS TO PLEASE HELP ME

**chemistry**

a 5.0 dm3 sample of oxygen at a pressure of 200 kPa and 2.0 dm3 sample of nitrogen at a pressure of 500 kPa are introduced into a 2.5 dm3 vessel. what is the total pressure in the vessel?

**introduction to accounting**

a merchandising company wants to include the cost of operating its warehouse in the cost of inventory. The company’s controller argues that the cost of the warehouse is a reasonable and necessary cost of getting the inventory ready for sale and, therefore, should be ...

**statistics**

5. Congressional Committee Memberships The composition of the 108th Congress is 51 Republicans, 48 Democrats, and 1 Independent. A committee on aid to higher education is to be formed with 3 Senators to be chosen at random to head the committee. Find the probability that the ...

**Algrebra 1**

x2(squared)-12=-x solve by completing the square

**Chemistry**

Thanks a lot! I realized that I forgot to account for the volume change when I calculated my molarities for the base and the acid, and that was enough to get the pH off by 0.01.

**Chemistry**

Okay, so I found the ion concentrations through the Henderson-Hasselbalch equation, and the concentrations I got: [Acetic Acid] = 0.036525666 [Acetate] = 0.063474334 I got the same concentrations as when I did my ice chart, and I also got the same delta pH, which was -0.266.

**Chemistry**

Here's what I did: So I set values for: [Acetic Acid] = y [H3O+] = 10^-5 [Acetate] = 0.1M - y Ka = 10^-4.76 And from the equation: Ka = [Acetate][H3O+]/[Acetic Acid], I found y, or the molarity of acetic acid, to be 10^-6/(10^-5 + 10^-7.46). And from this, I also got the ...

**Chemistry**

I did everything from the beginning and I didn't round anything at all until my last step where it told me to round to two decimal places. I still can't get the answer, though

**Chemistry**

Sorry, I forgot to say that it told me to round it to two decimal places.

**Chemistry**

A beaker with 100 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 6.10 mL of a 0.260 M HCl solution to the beaker. How much will the pH change? The pKa of acetic ...

**physics**

10 k r point g point degree

**English**

Help me write an essay on How I learned English by Gregory Djanikian.

**astrology of GEO PHYSICS**

3 point 666 point one fifth degree

**algebra**

It takes 7 hours for Will to paint a house. Judy can paint the same house in 3 hours. How long will it take them to paint the house if they work together?

**math**

2.75 divided by 1000

**Com/171**

What is wrong with this sentence: The diplomats are doing what they can to restore peace.

**Com/171**

Your welcome. I was happy to help.

**physics**

Consider a 1kg mass at rest at the equator.Because of the earths rotation , the mass experiences a centripetal acceleration. a)Draw free body diagram of mass b)Find centripetal force acting in the mass c)Compare apparent weight and true weight d)what fictitious force would the...

**math**

7x9=63

**chemistry**

What is the approximate thermal energy in kJ/mol of molecules at 275° C

**applied statistics**

Discuss how the General Linear Model assigns the optimal “weights” to predictor variables that allow us to maximize prediction accuracy. How are discriminant functions the optimal weighted linear composites for predicting “membership” regarding the ...