# Posts by Niki

Total # Posts: 179

**History**

Respond to a statement: The American Free Enterprise system is alive and well. If you don’t mind could you send me a link related to this statement

**Math**

Thank you

**Math**

Is the magnitude of an earthquake related to depth below the surface at which the quake occurs? Magnitude: 2.9,4.2,3.3,4.5,1.6,3.2,3.4,3.9 Depth:5.0,10.0,11.2,10.0,7.9,3.9,5.5,8.1 Equation: y=4.12+1.06x Question: does it make sense to predict the depth below the surface when ...

**EPI**

Is creating a responsible budget, savings and investing, and establishing credit worthiness show any key economic principles? Key economic principles: 1. People choose 2. All choices involve cost 3. People respons to incentives 4. The consequences of choices lie in the future

**Math**

The scores for students are 40,41,42,43,45,47,49,50,51,51,54,57,59,60,61,63,67,69,70,71 What is the percentile for the score 51.

**Science**

Explain the key factors that make an area a biodiversity hot spot. Include its abiotic and biotic factors

**Social Studies 7th Grade C.C.A**

Hi my name is Niki and I am doing a social studies portfolio and the question is Would You Like To Travel Central America and I have to do research on it and analyze my research then make an itinerary then write a persuasive essay please help me understand this I do not ...

**Statistics**

A basket ball player makes 70% of her free throws. She takes 7 free throws in a game, and makes 5 of her 7 throws. If the shots are independent of each other, Then what is the probability that she makes the first five and misses the last 2?

**math algebra**

Find an eqaution for the line passing through (1,3) and perpendicular to the line 3y=-2x+6

**Physics**

Suppose that at least 14.7 eV is needed to free an electron from a particular element, i.e., to ionize the atom. What is the lowest frequency photon which can accomplish this? And, what is the corresponding wavelength for that photon?

**math algebra**

when only the cold water valve is opened, a washtub will fill in 8 minutes. When only the hot water valve is opened, the washtub will fill in 12 mintues. When the drain of the washtub is open, it will drain completely in 7 minutes. If both the hot and cold water valves are ...

**Social Studies**

Yay thank you

**Social Studies**

Ok is the religion one right and is the next one to criticize the government?

**Social Studies**

The First Amendment protects which rights? (Select 2) - the right to own a gun - the right to a fair trial ** - the right to practice a religion (or not) ** - the right to criticize the government - the right of owning property help

**Math**

how are you supposed to help me if you are not even helping me

**Math**

how do you find the unit rate for A fertilizer covers 5/8 square foot in 1/4 hour.

**Math**

My question is how do you work out this problem and find how to get the answer

**Math**

Helppp i'm so stuck!!

**Math**

A fertilizer covers 5/8 square foot in 1/4 hour. i don't understand how to work out this math problem. By the way i'm in 6th grade but technically doing advanced math so i'm doing 7th grade math. I don't know how to do this

**Social studies**

Branch of goverment that carries out the laws

**Calculus**

Find the y-intercept of the tangent line to y= -0.2/sqrt(6+5x) at(2.5,-0.04990597277) Thanks

**Math**

-0.2 sqrt of (6+5x)

**Math**

Find the y-intercept of the tangent line to y=-0.2/ã(6+5x) at (2.5,-0.0464990554975277) Thanks

**Math**

Consider the function f(x) for which f(0)=7 and f'(0)=7. Find h'(0) for th function h(x)= 1/f(x). h'(0)=

**Math**

Suppose f(x)=5/(x-2). f'(5)=-5/9. Use this to find the equation of the tangent line to the curve y=5/x-2 at the point (5,(5/3)). write your answer in the form y=mx+b where m is the slope and b is the y-intercept. The equation of the tangent line is.....

**Chemistry**

List the grams of bleach solution necessary to provide 0.931g of NaClO(laundry bleach is 8.25% NaClO by weight) and the mL of bleach solution that contains the necessary amount... NaClO=74.442 g/mol. Need 0.931 grams of NaClO. Density of NaClO solution is 1.07 g/ml

**Math**

0.2, 15%, 1/8, 0.09... 15%=0.15, 1/8=0.125

**Algebra**

which ordered pair in the form (x, y) is a solution of this equation? (x+6)y=9 Possible Answers: A. (12,2) B. (3,1) C. (2,1) D. (4,1)

**World history**

How do enlightenment thinkers believe a person should rule ?

**Science**

Energy A would not be gravitational energy.. it would be electromagnetic Energy B would not be chemical...it would be gravitational potential but I don't see that as an answer choice,hmm

**Science**

I'm not sure what you are trying to answer. Are you figuring out what type of energy Energy A and Energy B are?

**Social studies**

I think it is false and that the use a grid map but I'm not sure?

**Social studies**

True or false To accurately label exact locations on a map, geographers go to that specific location. If false what is correct answer

**ds 71**

A company sells its product for $79. The company has marginal costs of $37 and annual fixed costs of $95,000. What is the annual total cost to produce 8,500 units of its product?

**Math**

Suraya has x apples and 8 oranges.How many apples and oranges does Suraya have altogether?Give your answer in terms of x.

**Physics**

An outfielder throws a baseball to home plate with a velocity of +15 m/s and an angle of 30°. When will the ball reach its highest altitude? (Points : 3) 1.2 s 1.5 s 0.77 s 0.50 s

**chemistry**

40 ml of carbon dioxide was collected and is at 10 degree celsius and at 740 mm pressure.Calculate its volume at STP.

**Chemistry**

1)what potential impurities were removed during solventless aldol recrystallzation? 2) two solids with different identities are frequently mixed together & do not melt, why do you suppose that the solids actually melted? (why do you assume that it has been melted)

**chemistry**

1)what potential impurities were removed during solventless aldol recrystallzation? 2) why do you assume that is already melted even if they didn't.?

**chemistry**

1) what potential impurities were removed during recrystallzation? 2) two solids with different identities are frequently mixed together & do not melt, why do you suppose that the solids actually melted?

**English**

My friend Jorge can play the guitar and sing. play is underlined would this be: part of a compound subject part of a compound verb phrase- part of a simple predicate I think its b.

**statistics**

the average yearly utility costs on Middleton is $1722 with stdev of 146. assume that the utility costs follow a normal distribution. 1) What would the utility costs have to be so that only 7% of houses in Middleton have utility costs greater than this amount

**math/help please**

This doesn't make any sense. What is the answer to this question i need help plz

**Biology question plz**

Srry I meant to say C because there are only three choices

**Biology question plz**

Which of the following depends on bacteria? conversion of dead organic matter to fossil fuel photosynthesis dissolution nitrogen fixation I think its A but I feel it could also be D, could you plz help?

**math**

A bottle of water costs $1.50. Explain how you would make a graph of four ordered pairs to model the total cost of the water in terms of the number of bottles.

**Math**

Gina's base pay rate is $12.25 per hour, with overtime pay of time-and-a-half, and double-time for holidays. Calculate her gross pay if she worked 4.5 holiday hours in addition to 39 hours Monday through Saturday Is this the proper way to set it up: (12.25 * 1.5 * 39)= ? (...

**Math**

Lee Lu is paid $12.50 per hour, with overtime pay of time-and-a-half for Saturday work and double time for Sunday. Calculate her gross pay if she worked 35 hours during the week, 5 hours Saturday and 3 hours Sunday.

**Finance - Annuities**

Natasha plans to deposit $4,000 per year in her account for each of the next 4 years. Thereafter, she expects to deposit $1,500 per year for another 4 years. All deposits are made at year-end. Interest rates are expected to be 8 percent for the next 2 years, and 11 percent ...

**Math**

26+27=? N then show how to make one addend the next tens number complete the new addition sentence

**Physics**

An aircraft has a cruising speed of 100 m/s On a particular day, a wind is blowing from the west at 75.0 m/s If the plane is pointed due north, what would be the magnitude and direction of the velocity relative to the ground? If the pilot wishes to have a resultant direction ...

**chem**

H2o2+3i+2h -----> I3+2H2o In the first 10.0 second of the reaction the concentration of I dropped from 1.000M to 0.868M a) calculate the average rate of reaction for iodine in this time interval. b) Determine the rate of change in the concentration of H during this time ...

**Chemistry**

A 7.85 g sample of a compound with the empirical formula C5H4 is dissolved in 301 g of benzene. The freezing point of the solution is 1.05C below that of pure benzene. what are the molar mass and molecular formula of this compound?

**math**

thanks

**math**

5s/(s^2-t^2) - s/(s-t)

**math**

4c/7c-14 + 6c/14c-28

**health 5 grade**

#4. i believe that the cold will affect my physical health, mental health, emotional health family and social health. i think that because this will affect the way how i act and it will also make weaker witch will affect my physical health. furthermore it will affect my family...

**health 5 grade**

i need help in health subject for my son 5 grade Question 1- connect suppose you have a cold. this affects your physical health. does if affect your mental,emotional,family, and social health, too? explain why or why not. Question 2- practice healthful behaviors Make a list of...

**chemistry**

Analysis of aluminum-zinc alloy Mass of gelatin capsule 0.1284 g ambient temp. 22c mass of capsule plus alloy sample 0.3432g ambient temp_________K mass of alloy sample, m__________g barometric pressure 745 mm Hg mass of empty beaker 144.5g Vapor pressure at H2O at ...

**chemistry**

As pure elements. all of the halogens are diatomic molecular species. their melting points are: F2, 85 K, Cl2 239 K, Br2 332 K, and I2 457 K. using periodic table, how can i predict the molecular formula of elemental astatine. at the only radioactive element in this family. ...

**chemistry**

i have to write lab report based on my determination of chemical formula & in lab we did experiment & found out the formula was cucl2*2h2o, in my lab report i have to start with mole to mole ratio how can i start writing that?

**algebra**

for the function g(x)=5x^6-3x^3+x^2-x, list the possible rational zeros of g(x) and then use synthetic division to factor g(x) completely.

**PHYSICS**

217

**algebra**

three students are running a race .how different ways can they finish the race

**english**

a group of tourists is being led through a famous cathedral by a guide. one family of four is japenese, but at least three other tourist in the goup ar not. All but five of the group are american what is the least number of tourists that can be in this group?.

**math**

In vanessa's coin bank there are 4 times as many quaters as nickels, 2 fewer dimes than nickels, and 15 pennies. the total amount in the bank is $5.80. How many of each coin are in the bank? assign a variable to unknown and write an equation to find unknown.

**math**

440

**math**

there are 1,320 ways for three students to win first,second,third place during a debate match. how many students are there on the debate team? explain your reasoning

**Chemistry**

I don't know how to reply to an answer. First of all thank you! For the question I just asked about the titration curves. Would that mean that titrating with barium hydroxide would take half the volume that is used when titrating with sodium hydroxide? Oh and there was a ...

**Chemistry**

If two titrations were completed were completed: 1) the titration of HCl with Na(OH) 2)the titration of HCl with Ba(OH)2 (the concentrations of acid and base for both titrations are the same) How would the titration curves of each solution be different? I know what the ...

**Chemistry**

So if two titrations were completed were completed: 1) the titration of HCl with Na(OH) 2)the titration of HCl with Ba(OH)2 (the concentrations of acid and base for both titrations are the same) I know what the titration curve of the first one looks like, but compared to the ...

**Chemistry**

How would the titration curve of hydrochloric acid solution differ if barium hydroxide was used to titrate instead of sodium hydroxide? How would the titration curve of hydrochloric acid solution with sodium hydroxide differ from the titration curve of acetic acid solution ...

**Chemistry**

What is the ph of the final solution when 10 mL of HCl is completely neutralized with 11mL of 0.1M Na(OH)?

**science**

the blue roller coaster will have the most kinetic energy because the first hill was a bigger drop.

**College Chemistry**

Would 20.0g of steam at 100 deg centi be enough to melt 20.0 g of ice at 0 degre cent

**calc**

Use the Midpoint Rule to approximate the integral The integral from 2 to 7 of (–1x–6x^2)dx

**Health**

Yes. All six dimensions of health are important. This provides a well balanced person. If the person is depressed or sad, this can throw off the balance of the body. The six dimensions of health - proper weight and diet; proper exercise; breaking the smoking habit; control of ...

**Algebra**

Write the equation in standard form. (2,8) m=9 What are the steps to do this?

**math**

if you know the number of faces on a pyramid you know the number of vertices true or false

**physics**

A metal sphere of radius r is dropped into a tank of water. As it sinks at speed v, it experiences a drag force F given by F = kr v, where k is a constant. What are the SI base units of k?

**statistic**

COME ON MS SUE. PLEASE DON'T ANSWER MY QUESTION IF YOU DO NOT KNOW!! BE PROFESSIONAL OK.

**statistic**

For a given month, a random sample of 30 sales girls from a superstore has a sample mean of salary of RM 800 with standard deviations of RM 140. Estimate the mean monthly salary for all employees using the 95% confidence interval.(what does mean of 95% confidence level?)

**statistics**

Yes i'm looking for the z score. Thank you so much.

**statistics**

1. On final examination in Business Law, the mean was 68 and the standard deviation was 12. Determine the standard scores of students receiving marks of 50?

**geometry**

An angles measure is 3 times of its complement. find the measure of the angle and the measure of its complement.

**calculus**

A container company is tasked to make an open-top rectangular box with a square base. The box must have a volume of 108cm^(3). let the length of the sides of the square base be x cm and the height h cm. (1) what value of x will produce the minimum outer surface area? (2) What ...

**Science**

Of the three local winds, which do you think could be easily harnessed for the generation of electricity by a huge wind farm and why? Land and Sea Breezes,Mountain and Valley Breezes or Chinook and Santa Ana Winds.

**chem**

at 40 degree C , the vapour pressure of water is 55.3 mm of hg. calculate the vapour pressure at same temp. of 10%aques solution of urea??

**geometry**

How do you find the perimeter of a regular dodecagon whose side is 12cm

**math**

How long will it take a given quantity of carbon-14 to lose 99.9% of its radioactivity if the half life is 5730 years? The formula I have been given is Q=ae^rt This is using log and ln functions.

**physics**

The temperature of 4.60 mol of an ideal monatomic gas is raised 15.0 K in an adiabatic process. What are (a) the work W done by the gas, (b) the energy transferred as heat Q, (c) the change ΔEint in internal energy of the gas, and (d) the change ΔK in the average ...

**physics**

An ideal monatomic gas initially has a temperature of 338 K and a pressure of 6.96 atm. It is to expand from volume 435 cm3 to volume 1310 cm3. If the expansion is isothermal, what are (a) the final pressure (in atm) and (b) the work done by the gas? If, instead, the expansion...

**physics**

An ideal monatomic gas initially has a temperature of 338 K and a pressure of 6.96 atm. It is to expand from volume 435 cm3 to volume 1310 cm3. If the expansion is isothermal, what are (a) the final pressure (in atm) and (b) the work done by the gas? If, instead, the expansion...

**physics**

A glass window pane is exactly 23 cm by 38 cm at 10oC. By how much has its area increased when it temperature is 49oC, assuming that it can expand freely? Take the coefficient of thermal expansion for the glass to be exactly 9 x 10-6/Co

**physics**

An ideal monatomic gas initially has a temperature of 338 K and a pressure of 6.96 atm. It is to expand from volume 435 cm3 to volume 1310 cm3. If the expansion is isothermal, what are (a) the final pressure (in atm) and (b) the work done by the gas? If, instead, the expansion...

**physics**

In a solar water heater, energy from the Sun is gathered by water that circulates through tubes in a rooftop collector. The solar radiation enters the collector through a transparent cover and warms the water in the tubes; this water is pumped into a holding tank. Assume that ...

**Modern Algebra**

Let F be a field and let f(x), g(x), h(x), and d(x) be polynomials in F[x]. Prove that if d(x)=gcd(f(x),g(x)) and both f(x) and g(x) divide h(x), then f(x)g(x) divides h(x)d(x).

**8th Grade Science**

I have to do a project and I have to have 9 or more physial and chemical properties of colloids and suspensions. I am soo stuck!!! Help!! Thanks!

**Math**

Construct a truth table for ~q^p

**math**

simplify 9qt9pt