Wednesday
July 30, 2014

Posts by jena


Total # Posts: 95

math
The sum of the first n odd number is n^2. The sum of the first 30 odd numbers is A. 60 B. 90 C. 300 D. 900 Thank you for the help in advance =)

math
The total mass of three identical boxes is 28.05 kilograms. What is the mass, in kilograms, of each box?

Math
y=1/2x+3 Slope? x-intercept y-intercept How do I graph this?

math
how do I graph- y=-3x-6

math
Y=-3x-6 Slope- x-intercept- y-intercept How do I graph this?

Math
Carol Miller went to Europe and forgot to pay her $820 mortgage payment on her New Hampshire ski house. For her 52 days overdue on her payment, the bank charged her a penalty of $23. (assume 360 days). What was the rate of interest charged by the bank?

Chemistry
Convert 29.8 atm into torr I did this 29.8(1/760) and got 22648 but its not going online as correct

Chemistry
Convert 29.8 atm into torr I did this 29.8(1/760) and got 22648 but its not going online as correct

Chemistry
Yes its correct, but how about he mass of NaHCO3 in the tablet assuming the mass of the tablet is 3.50 g

Chemistry
HCl is added to NaHC03 .

Chemistry
I did the equation of the % mass but its wrong

Chemistry
reaction between NaHCO3 and HCl

Chemistry
Performing the same experiment described on your lab manual, a student used a 0.358 g sample of Alka-Seltzer and the mass of CO2 was found to be 0.102 g. Based on this result, answer the following questions: Determine the mass of NaHCO3 that produced the CO2 in the experiment....

Chemistry
a student used a 0.358 g sample of Alka-Seltzer and the mass of CO2 was found to be 0.102 g. Based on this result, answer the following questions: Determine the mass of NaHCO3 that produced the CO2 in the experiment. Determine the % mass of NaHCO3 in the sample. Determine the ...

Chem Hmwrk
For the reaction HCl + AgNO3 → ,write the balanced formula equation

Human Services
I am doing an assignment on program planning and evaluation. In the last section of the essay I am supposed to identify the technical aspects that my fictional domestic abuse recovery organization may run into. I do not understand what a technical aspect is. Can anyone explain...

Algebra
How?? What are the equations?

Algebra
What is the domain and range of the equation y=-x^2-4x-7?

Algebra 1
Whats: -3 < j + 2 < 7

math
A = B*2^-ht B = initial Amount t = time h = half-life Is that the whole question?? Becuase that really doesn't make sense. If you give me the whole question I can give you can answer.

algebra
Find integer bounds for the roots of the following equation: 3x^5-11x^4-2x^3=38x^2-21x-15

Math 116
No I think it would be (9, 14).

Algebra
What are intersections and unions (in algebra). Also, what are complements? And what does MATH stand for in terms of sets? Please answer quickly. Thanks!

Math
Oh yes sorry I got confused...don't listen to me...

Math
35-24

Earth Science
Ok thank you. At first I was confused, but then I realized that I was mixing up quantitative and qualitative. It makes sense now. Thanks!

Earth Science
What are FIVE tools that we use to help us extend our senses when making quantitative observations?

Chemistry
If you are given 46 grams of magnesium how many grams of hyfrogen will be produced?

math- check me
(-3)/(5)y=-15 Does y=25

math- check me
Sung rented a truck for one day. There was a base fee of $17.99, and there was an additional charge of .90 cents for each mile driven. Sung had to pay $253.79 when he returned the truck. For how many miles did he drive the truck? $253.79=$17.99+.90 -$17.99 $$238.80=.90 divide ...

Math
I see what I did, I put a neg in front when it should have been and carried it through. Thanks

Math
h(x)=(2-2x^2)/-2 h(-2) I get (-2-2(-2)^2)/-2 (-2-2(4)/-2 6/-2=-3 h(-2)=-3

Math
g(x)=-5+sqrt(x-1) g(4)=-5+sqrt(4-1) is the answer -5+sqrt3

intermediate algebra-check my answer
Ok thanks

intermediate algebra-check my answer
I don't get a value for b, What am I missing?

intermediate algebra-check my answer
Find the equation of the line. find equation of form y=ax+b, where a is slope, and b is intercept, which passes through points (x1, y1) = (-8, -6) and (x2, y2) = (0, 0) slope 0-(-6)/0-(-8)= 3/4 how would I write it? y=3/4x or y=3/4x+0 ?

Helper helped
thanks

Algebra
Restated:For each equation, determine whether its graph is symmetric with respect to the -axis, the -axis, and the origin. 4y^4+24x^2=28 and y=1/(x^2+5) Check all symmetries that apply x-axis,y-axis,origin or non of the above.

Algebra
I get that the second equation x-axis. Is that right?

Algebra
Sorry y=1/(x^2+5)

Algebra
For each equation, determine whether its graph is symmetric with respect to the -axis, the -axis, and the origin. 4y^4+24x^2=28 and y=1/x^2+5 Check all symmetries that apply x-axis,y-axis,origin or non of the above.

Algebra
thanks

Algebra
Compute log7^6 . Round your answer to 3 decimal places.

Algebra-still need some help
I get (-inf,-5/2)U[-6,infin) but it doesn't look right

Algebra-still need some help
Homework Help Forum: Algebra Posted by Jena on Thursday, February 3, 2011 at 7:32pm. Find the domain of the function. f(x)=(sqrt x+6)/(-2x-5) Write your answer as an interval or union of intervals. Algebra - David, Thursday, February 3, 2011 at 7:42pm (-6,-5/2)and(-5/2,infinit...

Algebra
I'm lost

Algebra
Find the domain of the function. f(x)=(sqrt x+6)/(-2x-5) Write your answer as an interval or union of intervals.

Algebra desperate
Solve the following inequality. (x-4)/(-x+2)>0 Write your answer using interval notation

Algebra
Solve the following inequality. (x-4)/(-x+2)>0 Write your answer using interval notation

Algebra
Solve the following inequality. (x-4)/(-x+2)>0 Write your answer using interval notation

Algebra-problem restated
Solve the following inequality. (x-4)/(-x+2)>0 Write your answer using interval notation

Algebra
Solve the following inequality. (x-4/-x+2)>0 Write your answer using interval notation.

physics
how do you find time?

physics
A cat chases a mouse across a 1.7 m high table. The mouse steps out of the way, and the cat slides off the table and strikes the floor 2.1 m from the edge of the table. The acceleration of gravity is 9.81 m/s2 . What was the cat’s speed when it slid off the table? Answer ...

physics
A cat chases a mouse across a 1.7 m high table. The mouse steps out of the way, and the cat slides off the table and strikes the floor 2.1 m from the edge of the table. The acceleration of gravity is 9.81 m/s2 . What was the cat’s speed when it slid off the table? Answer ...

physics
An autographed baseball rolls off of a 0.63 m high desk and strikes the floor 0.46 m away from the desk. The acceleration of gravity is 9.81 m/s2 . How fast was it rolling on the desk before it fell off? Answer in units of m.

physics
A girl delivering newspapers travels 2 blocks west, 10 blocks north, then 4 blocks east. What is the magnitude of her resultant dis- placement? Answer in units of blocks. 077 (part 2 of 3) 10.0 points Find the direction (measured from due east, with counterclockwise positive) ...

physics
what is the vertical component?

physics
A cat climbs 20 m directly up a tree. What is the horizontal component of the cat’s displacement? Answer in units of m.

physics
A freight train has a mass of 3.2 × 107 kg. If the locomotive can exert a constant pull of 7.1 × 105 N, how long would it take to increase the speed of the train from rest to 74.6 km/h? (Disregard friction.)

chemistry
I am in need of help about this specific heat question. A 100.0g sample of aluminum released 1680 calories when cooled from 100.0 degrees C ti 20.0 degrees C. What is the specific heat of the metal? I tried setting it up: 1680 cal ________________________ 100.0 (100.0 *C- 20.0...

english
Are there any absolutes regarding rights and wrongs in the K-8 educational setting? Give examples to support your answer.

Geometry
A Regular Octagon with apothem of 9ft

math
Cola Company is offering its preferred customers a 25% discount on its most popular product normally listed at $40 each. a) What is the net price of each product to Cola Company's preferred customers? For full marks your answer(s) should be rounded to the nearest cent. b)...

College Chemistry
thank you Dr. Bob!!! :)

College Chemistry
I am trying to figure out how many minutes are required for sunlight to travel from the Sun to Earth? Assuming the sun is 93,000,000 miles from Earth and that sunlight travels at 1.86x10 to the 5th power miles per second. These things are so tricky, i know i have to convert se...

Milky Way
trying to google concept maps....try images if that help! best of luck!

College Chemistry
thank you so very much for your help!

College Chemistry
here is the question: A sapphire gemstone contains 52.7% aluminum, 47.% oxygen, and traces of titanium. If the saoohire was found to contain 0.155g of oxygen, what is the mass of the gemstone? i think this is a precent unit factor but i dont know how to set it up. PLEASE HELP ME!

math
Jeremy has a fish tank that has a 40-cm by 70-cm rectangular base. The water is 25 cm deep. When he drops rocks into the tank, the water goes up by 2 cm. What is the volume in liters of the rocks

math
On a biology test, a student got 25 questions correct but did not pass. On a second attempt, the student got 35 questions correct. What was the percent of increase?

math
Use a Venn diagram to determine whether A > (B < C) 5 (A > B) < C for all sets A, B, and C.

math
Consider the set of northwestern states or provinces {Montana, Washington, Idaho, Oregon, Alaska, British Columbia, Alberta}. If a person chooses one element, show that in three yes or no questions, we can determine the element.

College Chemistry
Are my calculations correct of i came up with 50.71g of CaH2 to the question, "How many grams of are needed to generate 54.5 of gas if the pressure of is 815 at 22?"

Math
12r-4r=48r=

Chemistry
How to find the mass of Oxygen that displaces water from the in the decomposition reaction of potassium chlorate using manganese 4 oxide as a catalyst. Am I to use stoichiometry or the combined gas law equation P1V1/T1=P2V2/T2

math
what is the title of this picture?

PHYSICS
A baseball is hit with a horizontal speed of 16 m/s and a vertical speed of 16 m/s upward. What are these speeds 5 s later? horizontal speed ?? m/s vertical speed ?? m/s

Chemistry
What is the molarity of a solution containing 20 grams of NaOH in 500 milliliters of solution? a-0.04M b-0.5M c-1M d-2M

English (College Prep)
I have to write an English essay about "The Crucible." Has anyone read the book, and understood it? I just need someone to help me brainstorm ideas to write about. Thanks!

math
What are some facts for rate and principle?

math
A cube with edges of length 2 centimeters is buildt from centimeter cubes. If you paint the faces of this cube and then break it into centimeter cubes, how many cubes wil be painted on three faces? how many will be painted on two faces? On one face? How many will be unpainted?...

Physics
A golfer, standing on a fairway, hits a shot to a green that is elevated 4.72 m above where she is standing. If the ball leaves her club with a velocity of 49.0 m/s at an angle of 42.5 ° above the ground, find the time that the ball is in the air before it hits the green.

Physics
The acceleration due to gravity on a planet other than the earth has a magnitude of 1.50 m/s2. As in examples 6, 7 and 8, a placekicker kicks a football with an initial speed of 20.3 m/s at an angle of 39.4 ° above horizontal. Assume that the ball is kicked on this other p...

Physics
A hot-air balloon is rising upward with a constant speed of 2.21 m/s. When the balloon is 2.25 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?

physics
1.The mass of a string is , and it is stretched so that the tension in it is 180 N. A transverse wave traveling on this string has a frequency of 260 Hz and a wavelength of 0.60 m. What is the length of the string? 2.A rocket engine emits of sound energy every second. The soun...

Physics
1.The mass of a string is , and it is stretched so that the tension in it is 180 N. A transverse wave traveling on this string has a frequency of 260 Hz and a wavelength of 0.60 m. What is the length of the string? 2.A rocket engine emits of sound energy every second. The soun...

Physics
1.The mass of a string is , and it is stretched so that the tension in it is 180 N. A transverse wave traveling on this string has a frequency of 260 Hz and a wavelength of 0.60 m. What is the length of the string? 2.A rocket engine emits of sound energy every second. The soun...

Physics
This time I have two questions: #1.A recording engineer works in a soundproofed room that is 49.7 dB quieter than the outside. If the sound intensity in the room is 2.66 x 10-10 W/m2, what is the intensity outside? #2.A listener increases his distance from a sound source by a ...

Physics
A rocket in a fireworks display explodes high in the air. The sound spreads out uniformly in all directions. The intensity of the sound is 2.89 x 10-6 W/m2 at a distance of 127 m from the explosion. Find the distance (in m) from the source at which the intensity is 1.56 x 10-6...

Physics
Tsunamis are fast-moving waves often generated by underwater earthquakes. In the deep ocean their amplitude is barely noticable, but upon reaching shore, they can rise up to the astonishing height of a six-story building. One tsunami, generated off the Aleutian islands in Alas...

Physics
the pressure is one atmosphere and determine the heat in joules required to produce 5.03 kg of water vapor at 100.0 °C, starting with (a) 5.03 kg of water at 100.0 °C and (b) 5.03 kg of liquid water at 0.0 °C. for part (a) I used the equation Q=mL and L was a given...

Physics
During an all-night cram session, a student heats up a 0.451 liter (0.451 x 10- 3 m3) glass (Pyrex) beaker of cold coffee. Initially, the temperature is 19.5 °C, and the beaker is filled to the brim. A short time later when the student returns, the temperature has risen to...

Physics
In the process of changing a flat tire, a motorist uses a hydraulic jack. She begins by applying a force of 49 N to the input piston, which has a radius r1. As a result, the output plunger, which has a radius r2, applies a force to the car. The ratio r2/r1 has a value of 6.9. ...

sociology
Hey Sarah, I find it a tad ironic that you are telling everyone else to use their brains when you post this: "Whatta concept!" - Yeah, that's proper grammar! Next time try posting something gramatically correct and you might make sense.

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