Posts by Mary
Total # Posts: 3,910

math please help and hurry!!
What is the rate of change for 2x^2 + 3 and 2^x + 3?? I have no idea please help meeeeeeeee 
Physics
A ball rolls down a ramp that's set on a table, and from there falls off the table. The height of the ramp, length of the ramp, and height from the table are known, and the task is to find the horizontal displacement. One can use mgh = 1/2mv^2 + 1/2kmv^2 to find the ... 
Physics
A ball rolls down a ramp that's set on a table, and from there falls off the table. The height of the ramp, length of the ramp, and height from the table are known, and the task is to find the horizontal displacement. One can use mgh = 1/2mv^2 + 1/2kmv^2 to find the ... 
chemistry
Calculate the [H?] for the aqueous solution in which [OH?] is 1 x 10??. Is this solution acidic, basic or neutral? Show your work 
english
the answer, i think, is who 
ELA
The answer to them is: 1.What does the speaker in "in Just—" mean when he says that "the world is puddlewonderful"? A. The world is full of puddles. B. Spring is rainy and wet.#### C. Winter's drought has ended. D. The balloonman fell into a ... 
English
Please show me an agumentative essay on boys helping girls in the kitchen 
SOCIAL STUDIES HELP PLEASE!!!
ohhh thank you for the kid site i think that helped thank you 
SOCIAL STUDIES HELP PLEASE!!!
Well i sorta did but i don't know i think i just needed a help start i will try to make something outta it thanks for the link 
SOCIAL STUDIES HELP PLEASE!!!
I did but i don't find the information usefull but anyways thank you Ms.Sue 
SOCIAL STUDIES HELP PLEASE!!!
how did the supreme court decision in Worcester V.Georgia and the Indian removal act lead to the removal and resettlement of native Americans groups? Can anyone help me with this please? 
spanish
nos 
Chemistry
The relative atomic mass of natural lithium is 6.95 it consist of two isotopes of relative masses 6.02 7.02 calculate the natural abundance of the isotopes 
Ms.sue....
how can i do it then? 
Math
Left hand! right hand Female___!________ Male_____!_______ Total18 ! 122 The incomplete table above summarizes the number of lefthanded students and righthanded students by gender for the eighth grade students at Keisel Middle School. There are 5 times as many righthanded ... 
Reed
yay! 
Reed
i never got banned 
Reed
how do you know? this is what you said... Trying to give and get answers here is frowned upon. The object is to help students learn, not just give away answers so that nobody has to study and learn anything. Giving away answers can get a person banned from Jiskha, temporarily ... 
science
is it D 
science
C=5/9(F32) The equation above shows how temperature F, measured in degrees Fahrenheit, relates to a temperature C, measured in degrees Celsius. Based on the equation, which of the following must be true? A temperature increase of 1 degree Fahrenheit is equivalent to a ... 
Music
how do you know? 
Math/Science
MEAN: 328.5 (green), 296 (red), 342.22 (bicolour) 
Math/Science
Reaction Time (ms) Cue Colour Green Red Bicolour (red only) 1 680 650 460 2 480 470 310 3 350 300 270 4 300 470 300 5 320 290 610 6 260 290 300 7 290 220 340 8 260 280 230 9 320 250 260 10 440 330 11 270 230 12 270 220 13 250 280 14 250 260 15 250 300 16 230 240 17 260 240 18... 
physics
A ball of mass 0.05 moving at 10m per seconds collides with another ball of equal mass at rest if two balls move off together after the impact calculate the common velocity 
Algebra 1
USE REGRESSION, FIND BEST FIT EQUATION FOR DATA (1,56), (2, 29), (3, 13), (4, 7), (5, 2) 
Algebra 1
Cassandra bought a car for 22,385. The value depreciates 14% a year. a. Write a function, d(x), that gives the value of the car after x years. b. What will the value of Cassandra's car be after 10 years 
Algebra 1
Evaluate a(1)b(1) 
Algebra 1
Give a value for x such the A(X)>b(X) 
Algebra
Factoring Polynomials GCF and Quadratic Expressions: 5b^2k^2+25bk^2250k^2 The answer I figured was GCF for the polynomial is 5 and the GCF for the variable is bk^2. Is this correct. 
physics
In a simple model of the hydrogen atom, the electron revolves in a circular orbit around the proton with a speed of 3.4 ? 106 m/s. Determine the radius of the electron's orbit. ___m 
How to solve algebra word problems
c+e=5 $3.50c+15e=5(4) 
How to solve algebra word problems
Pecans sells for $3.50 a pound. Almonds sells for $5 pound. How many pounds of each should be used to make 15 pounds of mixture that sells for $4 a pound? 
Math
An older person is seven years older than six times the age of a younger person. The sum of their ages is 21. Find ages 
Physics
A basketball is thrown at 8.00m/s [up] from a height of 2.00m and eventually comes back down to hit the floor. a)assuming a uniform acceleration of 9.80m/s^2 [down], how long was the ball in flight? b) calculate the balls velocity immediately prior to hitting the floor? I need... 
science
so then it has to be "a" since the earth revolves in its axis in a 24 hour period of time 
science
so then it has to be "a" since the earth revolves in its axis in a 24 hour period of time 
science
The main cause of the changing location of the tides on earth is rotation of the Earth on its' own axis  magnetic forces of the Moon  the revolution of the Moon around the Earth *** the position of the Sun 
Spanish help please
Libros b.Televisiones 
science
the best explanation of why the Moon appears to change shape throughout the month is •from Earth's perspective, we see varying amounts of the illuminated part of the Moon. • the Moon is revolving around the Earth** • from a bird's eye view, the Moon is ... 
science
thank you so much! 
science
I think it is increases as latitude increase but I am not quite sure 
science
the variation in seasonal temperatures and amount of daylight • decreases as latitude increases • changes most at the equator • stays the same at the North and South Poles • increases as latitude increases 
Algebra
On a scale drawing if 1/4 of an inch represents a distance of 1 foot then a line on the drawing measuring 8 1/2 inches represents ? Feet 
I.ter.ational bussiness
according to cnn (2016/06/24), the British pound (GBP) crashed to its lowest level as low as$1.32/GBP. The exchange rate on June 23rd 2016 was $1.4883/GBP a)by what % has the Gbp appreciated or depreciated against the dollar during this period? b)bu what % the US dollar ... 
I.ter.ational bussiness
according to cnn (2016/06/24), the British pound (GBP) crashed to its lowest level as low as$1.32/GBP. The exchange rate on June 23rd 2016 was $1.4883/GBP a)by what % has the Gbp appreciated or depreciated against the dollar during this period? b)bu what % the US dollar ... 
SAT
It says GPA= grade point average But for our local university entrance exams, we are studying Maths,Physics and Chemistry only.And the syllabuses may not be the same too.So how are we being compared? Do they conduct some kind of a placement test etc.when giving a scholarship? 
SAT
What is G.P.A. by the way? 
SAT
How much SAT score will be needed to get a scholarship to a good engineering university in the USA? I'm new to these things and hope someone will help,other than Google searching. Thank you! 
Universities
Yeah I'm doing that and I was just wandering whether I would get info from someone from the States. Thank you! 
Universities
What are the best universities in the USA which offers Transport and Logistics Management degree and what are the main requirements for an international student obtain a scholarship from that university for the mentioned degree? What are the chances for an internship after the... 
maths
The rectangular backboard of a basketball court needs to be assembled. Its area is given as 18,900 cm2 and the width as 1.8 m. What is the backboard’s length in metres 
math
the sum of the three numbers in GP IS 35 and their product is 1000. find the numbers 
Physics
A charge of 5.00 ? 10^9 C and a charge of 3.50 ? 10^9 C are separated by a distance of 60.0 cm. Find the position at which a third charge, of 14.0 ? 10^9 C, can be placed so that the net electrostatic force on it is zero. 
computer program
How do you design a program that asks for the sale figures, computes the total sales for the year, and calculates and displays final sale figures for the four quarters in 2010 and displays the average quarterly sale for the year? 
Chemistry
What is the molar concentration of K4Fe(CN)6 solution if 40 ml were used to titrate 150 mg of Zn ( that are dissolved ) forming K2Zn3[Fe(CN)6]2 ? I really need help for this excersice , I don't know what to do... Note: In my book the answer is 0,0382 M 
Chemistry
calculate the delta G^o and Kc for the reaction: 2Al + 3I2 = 2Al^3+ + 6I 
Chemistry
The delta G^o for a reaction : h2 (g) + i2 (g) = 2HI(g) Is 2.6 kj/moles. In one experiment the initial pressures are P h2 = 4.26 atm, P i2 = 0.024 atm, P hi = 0.23 atm. Calculate delta G 
Chemistry
The delta G^o for a reaction : h2 (g) + i2 (g) = 2HI(g) Is 2.6 kj/moles. In one experiment the initial pressures are P h2 = 4.26 atm, P i2 = 0.024 atm, 
stats
Consumer Reports rated airlines and found that 80% of the flights involved in the study arrived on time (that is within 15 minutes of scheduled arrival time). Assuming that the ontime arrival rate is representative of the entire commercial airline industry, consider a random... 
science
2. Compare and contrast deductive reasoning and inductive reasoning. Based on the information given here, answer the following questions about the experiment: • What are the qualities of deductive reasoning? • What are the qualities of inductive reasoning? • ... 
Math
Start at 500. Create a pattern that subtracts 4 from each number. Stop when you have 5 numbers. 
Math
Store a has a promotion if you Bryce three shirts you get 25% off the total price of the three shirts store be has the same shirts on sale with a promotion that if you buy three shirts you get the third shirt on a 50% discount store see has the same shirts on sale with a ... 
math
If two trapezoids have the same perimeter do they have the same area? 
Maths
60? 
English
What are some of the differences between old money and new money characters in the great gatsby? Is this distinction important in today's society? Why is the novel narrated from Nick's perspective? 
Algebra
One number is 2/3 of another number. The sum of the two numbers is 40. Find the two numbers. Use a comma to separate your answers. 
English
how does the history of the American Dream show a difference between our ideals and the reality of growing inequality and lack of social mobility. 
Math
The ratio of blue to red cars in a parking lot is 4/7. If there are 168 blue cars about how many red cars are there? 4/7=x/168 672=7x x=96 
math integral
Find the derivative of: G(x) = ?(top x) t^5 sin(?7t?4)dt . (bottom 9) 
Math
How do I find the value of sin ( AB) When tan A= 4/3 Cot B= 5/12 
physic
Two currents from different sources flow in opposite directions through a resistor. I1 is measured as 79 mA on a 100 mA analog instrument with an accuracy of ±3% of full scale. I2, determined as 31 mA, is measured on a digital instrument with a ±100 µA ... 
math
Find the degree 7 Taylor polynomial for f(x )= 2cos(3x) centered at x = 3?/2 . Thanks for your help 
core mathematics
Two boats are 70m and on opposite sides of a lighthouse.from the two boats,the angles of elevation of the lighthouse are 71 and 45 respectively.find the height of the lighthouse. 
Chemistry
Consider 1.00 L of the buffer system that contains 0.200 M hydrocyanic acid(HCN) and 0.150 M sodium cyanide (NaCN). The pKa of hydrocyanic acid is 9.31. What is the [HCN] after 0.020 mol of HCl is added? 
Math1
17.8 
alegebra
A study recently confirmed that of every 100100 citizens of a certain? state, 6060 are considered overweight. There were 299299 million citizens of this state in 2001. How many would be considered? overweight? nothing million citizens would be considered overweight. 
Physics
How much does it cost to operate a 23W porch light for 24 h if electric energy costs 8¢/kWh? 
math
A college student takes a standardized test and scores a 163. If the mean is 155 and the standard deviation is 7, what is the student’s percentile rank? (Assume a normal distribution.) 
Physics
1. Calculate the kinetic energy of a 5.2kg object moving at 2.4 m/s 7. Calculate the potential energy of a 5.2kg object positioned 5.8m above the ground 21. Calculate the speed of a 5.2 kg object that possesses 26.1 J of kinetic energy. 
Grade 6: money and measures
12 
chemistry
a student performs the lab on an unknown metal and obtain the following data 
Physics
a=47.60/17.6 a=2.705 seconds 
Physics
The velocity graph of a particle moving along the xaxis is shown. The particle has zero velocity at t=0.00s and reaches a maximum velocity, vmax, after a total elapsed time, t total. If the initial position of the particle is x0 =6.22m, the maximum velocity of the particle is... 
Physics
t= sqrt (8.306) = 2.88s d= 234m/s * 2.88s = 674.40m Thanks! 
Physics
A cannon ball is fired horizontally from a cannon that is 40.7m above the ground. The initial velocity of the cannon ball is 234m/s. How much time does the cannon ball spend in the air? 
Math
cos(x)/(1tan(x)) + (sin (x))* cos(x))/ sin (x)cos(x)) 
chemistry
the value would be too high because the density should have had a denominator that was a bit lower and a numerator of grams 
chemistry
a pipet can be calibrated. we expected the volume to be 25.00ml, but the actual volume was significantly less. if you had measured the density of an unknown with this pipet and assumed that v=25.00ml, your result would not be correct. would it be too high or too low? Explain 
Science
The surface r of a liquid depends on the density p acceleration due to gravity g nd height h use the method of dimension to derive the actual relationship between this quantities. An object is tie to the end of a string move in a circle the force exerted by the string depend ... 
chemistry
Express the composition of each of the following compounds as the mass percents of its elements...? 59) Express the composition of each of the following compounds as the mass percents of its elements. a) formaldehyde, CH2O b) glucose, C6H12O6 c) acetic acid, HC2H3O2 
Math
How do you find P if A=1/2a+P, and you have both the values of a and A? 
Writing Skills
Just took the test and it actually was C. reference book 
Writing Skills
B. Medicine, Thank you for the help 
Writing Skills
The call number of the book that you're looking for is R865.2. What do you know about the book based on this information? A. It's a book of or about Roman literature. B. It's a book about medicine. C. It's a reference book. D. It's a book that can be gained... 
History
If The British Government Could Do It Over Again The British governing policy of salutary neglect gave the young colonial governments a chance to "experiment" with their own selfgovernance. Gaining confidence in their abilities to rule the people without the British... 
Math
Susie spent 4 1/4 hours on Monday and 3 5/8 hours on Tuesday working on a history project. About how long did she spend working on the project? 
Civic education
alienable fundamental rights to whichie inherently entitled sumply because he or she is a human being. 
algebra
I have to write and solve as literal equation. 
algebra
I want to visit a friend that lives 200 miles away. Gas is $4 a gallon. My car gets 50 miles every 2 gallons of gas. How can I solve this using an literal equation? 
Maths
A right circular cone of base radius 5 cm and depth 20 cm is held with its vertex downwards. If water is leaking through a small hole in the vertex at the rate of 8 cm^3/s, find the rate of change of the water level in the cone when the radius of the water surface is 4cm, ...