Posts by Tom
Total # Posts: 1,541

Trigonometry
Write 4 other points for (3,11?/3) on 2? ? ? < 2? 
Trigonometry
1. Convert r= 2/1+sin? to cartesian 2. Convert y=3 to polar 3. Convert 3x^2+3y^26x=0 to polar 
math
find [dy/dx] x^2 Using this : limit as the change of x —> 0 for f(x + deltax)  f(x) ————————— deltax run through each step 
History
the link only had 3 people on it 
History
8 most influential 
History
who are the most influential people of the 1920's or 1930's Canadians 
History
there was only 3 people on all of those google searches that I could find 
History
could not find anything with that link 
History
yes Canadians 
History
I am doing a History project and i need to know ranked 1 to 8, 8 most influential people of the 20's and 30's 
History
what made the 1920's roaring 
History
what are the 4 main causes that lead to the great depression 
History
what were the four leading causes to the great depression 
Physics
Thank you! 
Physics
When the Philae probe landed on Comet 67P, it took approximately 28 minutes for a radio signal to be received at the European Space Operations Centre. Determine the distance (in metres) from the Philae probe to Earth. 
Trigonometry
Thank you so much! 
Trigonometry
well this is supposed to be a parabola, and i just need help with factoring it into an standform equation that looks like this: (xh)^2=4p(yk) or (yk)^2=4p(xh) 
Trigonometry
Write in standard form: 2y^2+x4y+1=0 
Physics
Supposed to be 41.6m/s. And how can I tell if it's moving towards or away from the observer? 
Physics
The note D above middle C has a frequency of 294 cycles per second, and the note E has a frequency of 330 cycles per second. A driver of a moving car sounds the horn, which emits an E tone, but a stationary observer hears a D tone. Calculate the speed at which the car is ... 
Maths
Okay that really helps. Thank you! 
Maths
How do you go about getting a quadratic from the sum and product? Sorry about this I'm not great with root questions 
Maths
Consider the cubic polynomial f(z) =z3?2z+ 4. Given that z = 1 +i is a root of f(z), determine all the roots of f(z) in C 
Engineering
A heated spherical ceramic object (diameter= 10cm), initially at 1200k, is held in a large enclosure whose walls are maintained at a temperature of 300k. The sphere has an emissivity of 0.7. Properties of Sphere: Density =4500 kg/m^3, heat capacity= 400 J/(kg.K); thermal ... 
Geometry
In a triangle, prove the perpendicular from the vertex opposite the side that is not less than either of the remaining sides falls within the triangle. 
Geometry
Thank you. 
Geometry
For a point, give a construction of a line so the portion intercepted by the segments of a given angle are bisected at the point. 
SAT
i was thinking C 
SAT
the collection of antique puppets, A(all older than) two hundred years, had been B(painstakingly) made for youngsters C(long since) gone. D(no change) find the mistake 
math
the gross domestic product (GDP) of a certain country is growing at a constant rate. In 2009 the GDP was 125 billion dollars , and in 2011 it was 155 billion dollars. At what percentage rate will the GDP grow in 2014? 
AP Calculus Help Five Questions
1. Find the particular solution to y " = 2sin(x) given the general solution y = 2sin(x) + Ax + B and the initial conditions y(pi/2) = 0 and y'(pi/2) = 2. 2. What function is a solution to the differential equation y '  y = 0? 3. If dy/dx = cos^2(pi*y/4) and y... 
AP Calculus
Find the particular solution to y ' = 2sin(x) given the general solution is y = C  2cos(x) and the initial condition y(pi/2) = 1 
AP Calculus
Find the area of the region bounded by the curves y = sin^1(x/2), y = 0, and x = 2 obtained by integrating with respect to y. Please include the definite integral and the antiderivative. 
calc
cotx =  rad3 / 3 does x= 2pi/3 and 5pi/3? 
math
(4x^4  4x^2 + 6x) / (x4) show how youd divide this using synthetic divison 
Computer Programming
java please help Build a presidents() method that prints out the names of the first 7 Presidents of the United States, each on separate lines. Remember to make your method a static method. Have your main method call the presidents() method. Call your class “PresClass” 
history
in the most basic terms, what is a tariff and what is it's purpose? 
math
f(x)= 3x^2 +12x + 2 when you complete the square, is it y= 3(x+2)^2  10 
chemistry
2NO2(g) <> N2O4(g) If 0.625mol of dinitrogen tetraoxide in 5.0L is allowed to come to equilibrium and at equilibrium has a concentration of 0.0750M, Calculate K for this reaction. Does K= 7.5? 
math
x^2 + 4x = 2 do you have to factor out a 1 before you complete the square? and whats the answer in vertex form? 
physics
Two slits are 0.158 mm apart. A mixture of red light ( wavelength = 65 nm) and yellow green light (wavelength = 565 nm)falls on the slits. A flat observation screen is located 2.24 m away. What's the distance on the screen between the third order red fringe and the third ... 
physics
Two point sources produce waves in phase with the same amplitude and wavelength. The sources are a distance d apart. The distance from the right bisector to a point on the second nodal line is x2. The distance between the sources is cut in half. What is the new distance from ... 
physics
This is the multiple choice given to me. I was stuck too. Any idea what would be the answer from 4 multiple choice 
physics
Two small loudspeakers emit sound waves of the same amplitude and frequency in phase with each other. The waves produce an interference pattern such that the distance from the right bisector to a point P on the third nodal line is x3. The wavelength of the sound is increased ... 
math
Find 37.5% of $320 (which is $120), and subtract that value from $320, and your result is $200. 
math
$200.00 
math
2sec^2x  3tanx  5 = 0 over the interval 0 to 2pi x= 1.14, 4.28, 5.68, and 2.54 right? 
mathh
2sec^2x 3tanx =5 for [0,2pi) Please solve for the values of x for me. 
math
and what are the answers 
math
2sec^2x 3tanx =5 for [0,2pi) 
Math
A ferris wheel has a radius of 20m and the bottom is 2m above the ground. The wheel makes one rev in 40 sec. If the rider gets on at 30^0 on the left of the lowest point going downwards, wirte the sine function to show this movement 
Math
Some one gets on to a ferris wheel 30^0 left of the bottom. What would be the phase shift if I am writing a sine Function? Is it 120^0 or + 120^0. Please explain. It's turning counter clockwise. 
Math
Some one gets on to a ferris wheel 30^0 left of the bottom. What would be the phase shift if I am writing a sine Function? Is it 120^0 or + 120^0. Please explain. 
calc
numerically on a graphing calculator? 
calc
lnx = x^3 + 1 i know x=1 but can you solve this algebraically? 
Physics
A 72 kg bungee jumper jumps from a bridge. She is tied to a bungee cord whose unstretched length is 12 m , and falls a total of 35 m . Calculate the maximum acceleration she experiences. 
Caluclus
Find the point on the line 7x+1y?5=0 which is closest to the point (?2,?6). 
precalculus
how to find the max and min of a sine function? For the maximum, do you do midline+ amplitude? For the midline Amplitude? f(x)= 7cosx + 15 Max is 15+7=22 min is 157= 8 
information systems
Assignment: You are required to briefly but properly document the functional requirements for an INVENTORY INFORMATION SYSTEM by creating the following using the correct symbols: 1. The description of the selected information system in the selected business 2. Use Case ... 
History
have you even looked it up yet? 
precalc
y= 2cos(pi/6) + 8 whats the maximum and minimum? 
precalc
min is 6 and max is 10? 
precalc
y= 2cos(pi/6) + 8 whats the maximum and minimum? 
college chemistry
if co2 were soluble in h2o, how would that affect the calculated value for molecular mass of the co2? 
CHEMISTRY
thank you very much 
CHEMISTRY
The heat evolved in the reaction of hydrobromic acid with potassium hydroxide was determined using a coffee coup calorimeter. The equation for the reaction is: HBr(aq) + KOH(aq) > KBr(aq) + H2O(l) When 25.0 mL of 1.00 M HBr at a temperature of 24.5oC was ... 
Chemistry
How many liters of oxygen are required to react completely with 2.4 liters of hydrogen to form water? H2 + O2> H2O? 
Chemistry
Awesome that's what I got too. 
math
85=5e^0.025x solve for x 
Math
Simplify the algebraic expression: 72[3(2x5)(5x+3) 
Math
Solve for X: 15(3x8) = 4x5(3x7)25 
Math  Algebra
Solve for X 15(3x8) = 4x5(3x7)25 
Math  Algebraic expressions
Simplify the Algebraic Expression 72[3(2x5)  (5x+3)] 
Math  Algebraic equations
Thanks for the assistance Reiny. Much appreciated 
Math  Algebraic equations
A stamp collector bought 295 stamps for $87.75. The purchase included 5 cent, 25 cent, and 40 cent stamps. How many of each type stamp was purchased? 
Math Algebra
A stamp collector bought 295 stamps for $87.75. The purchase included 5 cent, 25 cent, and 40 cent stamps. How many of each type stamp was purchased? 
Physics
In an experiment conducted using the Young's doubleslit apparatus, the separation between the slits is 20 µm. A firstorder constructive interference fringe appears at an angle of 2.5o from the zeroth order (central) fringe. A. What wavelength of light is used in ... 
Statistics
There are two decks of cards. Each deck has a red, a yellow, a blue, and a green card in it. If a card is drawn, from the first deck, and then a second card drawn from the second deck, what is the probability that a red card and green card are drawn (not necessarily in that ... 
calculus
ohh i see it cot x = radical 3 / 3 so the tan x = 3 / radical 3 — which is radical 3 when rationalized so x= pi/3? and 4pi/3? 
calculus
wait i’m lost so you get radial 3 / 3 Then what ? 
calculus
in the second step , don’t you divide by 3 on both sides ? 
calculus
3cotx  radical 3 = 0 solve for x please show it step by step 
Math please help!!!
Thank you 
Math please help!!!
Solve the system of equations to find x,y,z (hint let d=x2 e=y2 and d=z2 . Find d e and f first) 2 means squared I don't have it on my keyboard. X2+y2+z2=9 3x2y2z2=7 Y2+2z2 =6 
Precalc
16/(2x+2) 
Precalc
Perform the operation and write the result in standard form. ___16___ 2x+2 
Precalc
Find a polynomial function with 2 and 3i. 
Economics
The pricing of pharmaceutical products can be controversial. A recent example is EpiPen produced by Mylan which is used to treat anaphylaxis. The retail price of an EpiPen is $300, while industry sources estimate that it costs around $30 to produce each unit (i.e. one dose). ... 
calc
so is it x+y 
calc
given that log2 3 = x, log 2 5=y and log 2 7 = z, express log 2 21 in terms of x,y, and z the 2 is the base 
calc
tan3x= radical3 / 3 
calc
so what about tan3x= radical3 / 3 
calc
sin2x = (radical 3)/ 2 solve each equation on the interval [0,2pi) 
Computational Thinking
The Happy Cow Ice Cream Company manufactures several types of ice cream. Design a flowchart or pseudocode for a program that accepts an ice cream flavor (for example, “triple chocolate”), price per gallon, and number of gallons sold in the average year. Display a ... 
Computational Thinking
Anybody Help on this:The Daily Gazette accepts classified ads in several categories. For most ads, the newspaper charges 10 cents per word for the first 50 words, and 8 cents per word for every word after that. Design a flowchart or pseudocode for a program that accepts data ... 
calc
csc 5pi/6 = is it 2? 
computer code
Design a pseudocode for a program that accepts an ice cream flavor the price per gallon and number of gallons sold a year, display a message this flavor is the best seller having more than 40000 gallons a year sold 
CHEM
lol you're dumb. it clearly asked for an answer for grams and the answer key says it's 100g 
CHEM
dude i converted from grams to moles to moles back to grams 
CHEM
so the answer is 100g?