Posts by nicole

Total # Posts: 1,926

Chemistry
I don't understand C and D

Chemistry
A 100 milliliter sample of 0.100-molar NH4Cl solution was added to 80 milliliters of a 0.200-molar solution of NH3. The value of Kb for ammonia is 1.79 x 10^-5. (a) What is the value of pKb for ammonia? (b) What is the pH of the solution described in the question? (c) If 0.200...

Math
For what values of x does x - 9 = 0?

math-geometry
The length of the hypotenuse of a right triangle equals the length of one of the legs of the triangle. a.) Always true b.) Sometimes true c.) Never true I for A for the answer is that correct?

math
ok so it will be a?

math
ok I got b for the answer is that correct?

math
Assume that the salaries of elementary school teachers in the United States are normally distributed with a mean of $36,000 and a standards deviation of $6000. What is the cutoff salary for teachers in the bottom 10%? Answer choice: a. $28,320 b. $43,680 c. $45,870 d. $26,130

math
A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 450 seconds and a standard deviation of 40 seconds. The fitness ...

math
im sorry

math
so it will be 5 over 2,598,960= 5/2,598,960?

math
thats what I said....lol

math
A standard deck of cards is made up of four suits with 13 cards in each suits (total of 52 cards). If we randomly sample five cards from a standard deviation of $6000. What is the cutoff salary for teachers in the bottom 10%? Answer choice: a) 5/2,598,960 b) 1287/2,598,960 c)...

math-HELP
I ask my self the same question the reason i was getting confused... Thanks so much

math
The length of the hypotenuse of a right triangle is ã2 times the length of one of the legs of the triangle. answer choice: a.Always true b. sometimes true c. never true

math
How many 5 card poker hands consisting of 3 aces and 2 kings are possible with an ordinary 52-card deck? Answer choice: a).12 b).288 c).6 d).24 I got 24 is that correct?

geometry
How many 5 card poker hands consisting of 3 aces and 2 kings are possible with an ordinary 52-card deck? Answer choice: a).12 b).288 c).6 d).24 I got 24 is that correct?

geometry
HELP.... In a certain lottery, 3 numbers between 1 and 9 inclusive are drawn. These are the winning numbers. How many different selections are possible? Assume the order in which the numbers are drawn is not important. Answer choice: a.) 6 b) 84 c) 504 d) 729

Math
If x is an angle in the first quadrant and cscx = 3 find the exact value of cos 2x

Trigonometry
I was only two steps from being right!

geometry
A tourist in France wants to visit 5 different cities. If the route is randomly selected, what is the probability that she will visit the cities in alphabetical order? Answer choice: a)120 b)1/5 c)1/120 d)1/25

math
so bob the answer is a?

math
Which of the following conditions does not ensure that a quadrilateral is a parallelogram? Answer choice: a) the diagonals bisect each other b) both pair of opposite sides are parallel C)a pair of opposite angles are congruent d) all of the above

math
Which of the following conditions does not ensure that a quadrilateral is a parallelogram? Answer choice: a) the diagonals bisect each other b) both pair of opposite sides are parallel C)a pair of opposite angles are congruent d) all of the above

math
suppose a calculator is on salr at a 15% dicount. If it normally sells for $29.99 what is the sale price ?

social studies
why were many children's and adults right hands cut off by agents of king leopold?

social studies
why was king leopold's reign described as "legalized robbery"?

Math
4 batches

math
Determine whether the statement is always true, sometimes true, or never true. 3) The length of the hypotenuse of a right triangle equals the length of one of the legs of the triangle. Answer choice: a.) always true b.) sometimes true c.)never true

math
#2 Determine whether the triple of numbers can be the sides of a right triangle. 2)9,12,16 Answer choice: a.) yes b>) no

math
Thanks

math
A game is played by flipping three coins. If all three coins lands heads up you win $15. If two coin lands heads up you win $5. If one coin lands heads up you win $2. If no coins land heads up you win nothing. If you play $4 to play, what are you expected winnings? Answer ...

Biology
One family of mammals includes true horses (Equus), zebras (Hippotrigris and Dolichohippus), and donkeys and asses (Asinus). Zebroids are hybrid offspring of wild zebras and domesticated horses that were confined to the same pasture. The unnatural confinement breached the ...

math plz help
is*

math plz help
ok so i have this math problem and it says to list the recipricol and i don't know what a recipricol can you tell me what it is?

math help plz!
did u look it up???

English 12
i think that ms sue is corret and that was what i was going to say and it matters what this might be for

Math probability
A bag contains 13 marbles of which 10 are red. A marble is selected at random and replaced. A second marble is then selected at random. What is the probability that both marbles are red?

Economics
The nation experiences a major hurricane that destroys significant capital stock. Policymakers in the federal government reason that the destruction caused by the hurricane will reduce national income and that this should be counteracted through an increase in government ...

algebra
1. Imagine you are at a gas station filling your tank with gas. The function C(g) represents the cost C of filling up the gas tank with g gallons. Given the equation a. What does the number 3.03 represent?

Math
Would you be more likely to get at least 70% tails if you flip a fair coin 10 times or if you flip a fair coin 1000 times? A) You would be more likely to get at least 70% tails if you flip a fair coin 10 times than if you flip a fair coin 1000 times. B) The probability of ...

World History
What were the political and social ramifications of the changing economy in 1830-1832

World History
What happened when the revolutionary dike broke in the early 1830's?

Economics
a. Your firm’s costs of production? Explain. As firm is making short-run profits, new firms will enter into the market. Demand for input factors will increase. So, inputs will become costlier for increasing-cost industry. We can say that costs of production will increase...

history
i have to do a power point presentation of 6-9 slides. no more than 1/3 of the presentation can be pics. i have to include speaker notes and references. it also must include at least 1 in-text citation. Explain how the U.S. became involved in the politics of Southeast Asia. ...

geology
I am looking for some ideas of various geological events of Florida

geology
I am actually trying to find a popular geological event that occurred that led to geological features

geology
what is a popular geological feature of florida

chemistry
what two metals that will not generate hydrogen gas when treated with an acid?

economic
Hi it's me again (Nicole). I think I have #3. Reduced spending means a decrease in demand. Due to this decrease in demand the real interest rate will fall. This keeps prices lower. The graph is pretty standard.

Personal Finance
Isabel deposits $6,000 into an account that earns 1.5% interest compounded monthly. Assuming no more deposits and no withdrawals are made, how much money is in the account after 4 years?

PHYSICS
777

Physics
The centers of a 14 kg lead ball and a 120 g lead ball are separated by 9.0cm .What gravitational force does each exert on the other?

world geography
since the 1970 european have tired to limit

5th grade math
find the surface area of a rectangular with the measurements of 4 5 and 8

Physics
The instant before a batter hits a .14 KG baseball, the velocity of the ball is 45 meters per second west. The instant after the batter hits the ball, the ball's velocity is 35 meters per second eat. The bat and ball are in contact for 1.0 x 10 ^-2 second. How do I ...

Physics
The instant before a batter hits a .14 KG baseball, the velocity of the ball is 45 meters per second west. The instant after the batter hits the ball, the ball's velocity is 35 meters per second eat. The bat and ball are in contact for 1.0 x 10 ^-2 second. How do I ...

Chemistry
Because AgNO3 has nitrate in it, and nitrate is ALWAYS soluable, the AgNO3 dissociates 100%, which means that in the solution there are Ag+ and NO3- ions. When added to this equation, the Ag+ ions and Cl- ions will react using up some of the Cl- ions in the reactants side, ...

Algebra
Okay...now I understand. Thank you very much!!

Algebra
For which table(s) of values in Exercises 39–42 is the relationship linear? Tell how you decided. Write the equation for each linear relationship. x y 5 20 10 30 15 40 20 50 25 50 30 50 bobpursley stated "Look at y. It stays constant at the end. If it were always ...

Algebra
"Write a brief scenario that can be modeled with a linear equation. Summarize a situation modeled by a quadratic equation." Although I understand the difference between the two, I'm having a hard time creating problems that express them.

6th grade math
how much is 3pt to a cup

Volume of a rectangular prism
If a triangular prism has length 10m and volume 180 m3 what are two possible integer height and width

10th grade
Find the measure of diameter AC if BP=x and AC=5x-6

Geometry
If the edge of a cube is doubled, the volume is?... a. half as much, b. doubled, c. quadrupled, d. none of these

Geometry
Hi Ms. Sue! Although I do appreciate your help I am still having trouble with this problem because I am confused about how to find the height of the triangles. I did notice I mistakingly wrote that I was working with right triangles, they are equilateral. Again, Thank you very...

Geometry
I would greatly appreciate any help I can get with this problem. I need to find the volume of a right triangular prism. The sides of the triangles measure 2cm and the length of the prism is 10cm. I found the surface area to be 64sq cm...is this correct? And can I somehow use ...

amercian government
dramatic change in public opinion on basic issues is uncommon and is almost always a cosequence of?

accounting
Your team has been assigned the duty to diagram the audit trail for your company. In your diagram, show several transactions and how they would be tracked from the journal entry to the financial statement and back to the journal entry

Geometry
Aren't they the same?

Geometry
How do the axes of rotational symmetry of an octahedron compare to the axes of rotational symmetry of a cube?

classroom instruction 9not sure if i am right)
THIS IS GOOD! :)

SCI/275 ENVIRONMENTAL SCIENCE
What is this asking?

Geometry
Thank you!

Geometry
Show that Euler's formula holds for a right pentagonal prism.

math
Thank you!

math
How many rectangles will fit about a point when tessellating the plane? How do you know?

math
A girl has a score of 59 and wants to know how to get a mean of 69. She would like to use two more scores to get that mean. What numbers did she use? Please help!

calculus
ok then think about what you have to do first :)

calculus
is that a negative 3?

math
how did you do the decimal?

math
plzzzzz help!!!

math
67 * 56% = ?

Math
Oh yes I understand very well how important it is to be very clear when asking a question like this, but it's one of the questions on an assignment with multiple choice answers. The best that I could come up with looks like 2x2x2x2x2x5=160....(5 for the various cheeses, 2 ...

Math
We are working on permutations and combinations and the problem reads as follows: A deli offers its cheese sandwich with various combinations of mayonnaise, lettuce, tomatoes, pickles, and sprouts. 5 types of cheese are available. How many different cheese sandwiches are ...

mathematics
Angles 1 and 7 are alternate exterior angles of a transversal cutting two parallel lines. If m(angle1)=4x+10 and m(angle7)=6x+4, what are the measures of angles 1 and 7? Give a property of angles that helped you solve the problem. What's confusing me about this problem is ...

geometry
What's throwing me off a bit on this problem is the fact that angles 1 and 7 are alternate exterior angles. Is this possible with the two lines being parallel?

geometry
Angles 1 and 7 are alternate exterior angles of a transversal cutting two parallel lines. If m(Ú1)=4x+10 and m(Ú7)=6x+4, what are the measures of angles 1 and 7? Give a property of angles that helped you solve the problem.

physics
0.25 m/s^2

math
math is a hard thing for me sometimes and i need help with the question 5% OF 36 PLEASE HELP!

Math
The numbers 1-10 are placed on cards, and the cards are put in a hat. If two cards are drawn, in order, without replacement, what is the probability that a. both are composite? b. one number is even and the other is odd? c. one number is even and the other a prime?

Math
At a party, 55 handshakes took place as everyone shook hands with everyone else. How many people were at the party?

math
What are the odds against throwing either a sum of 3 or 8 in rolling a pair of regular dice?

math
What are the odds against getting a head and a tail in a single toss of two coins?

physics
There's a problem my professor assigned, but I'm not sure which equation/process I should use to solve it. Please help. Two particles having charges of 0.420nC and 15.1nC are separated by a distance of 1.50m. At what point along the line (in m from the particle with ....

math
-x +2 18 ------------- 8 9

4 grade
20

math
Give a verbal, visual, numerical, and graphic representation for the idea one-fourth.

math
How would you instruct someone to take one-fourth of a pizza if you could not use the word one-fourth?

Physics
I am reposting this since I did so incorrectly the first time. (I apologize for posting it twice the first time as well...I accidently hit refresh) Here is the problem with the proper units: You are trying to overhear a juicy conversation, but from your distance of 15.0m , it ...

physics
You are trying to overhear a juicy conversation, but from your distance of 15.0 , it sounds like only an average whisper of 35.0 . So you decide to move closer to give the conversation a sound level of 60.0 instead. How close should you come? (in cm)

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