Tuesday
July 29, 2014

Posts by Anonymous


Total # Posts: 70,619

Physics
A certain planet is located 3.54 x 10^11 m from its sun. If its orbital period is 4.9 x 10^7 s, find the mass of its sun.

Math
Ryan left the science museum and drove south. Gabriella left three hours later driving 42 km/h faster in an effort to catch up to him. After two hours Gabriella finally caught up. Find Ryan's average speed

Chemistry
what three substances are usually electrolytes?

gfd
A 10.6 kg object oscillates at the end of a vertical spring that has a spring constant of 2.05 × 104 N m-1 . The effect of air resistance is represented by the damping coefficient b = 3.00 N .s m-1 . (a) Calculate the frequency of the damped oscillation. (b) By what perc...

problem solving
Erica painted a picture of her dog. The picture has an area of 3600 cm square and is square. She has placed the picture in a frame that is 5 cm wide. What is the perimeter of the picture frame?

Probability
320

math, geometry
The bases of trapezoid ABCD are \overline{AB} and \overline{CD}. Let P be the intersection of diagonals \overline{AC} and \overline{BD}. If the areas of triangles ABP and CDP are 8 and 18, respectively, then find the area of trapezoid ABCD.

Physics
A ammeter is to be constructed using a galvanometer that has a 2.00 mA full-scale deflection and internal resistance of 50.0 ohms. It must be good enough to detect 40 mA, which is the max current. How would one do this? How would you make a voltmeter able to read the largest v...

physics
A 1.50 ✕ 103 kg car starts from rest and accelerates uniformly to 17.1 m/s in 12.7 s. Assume that air resistance remains constant at 400 N during this time. (a) Find the average power developed by the engine. W (b) Find the instantaneous power output of the engine at t ...

Precalculus
I know I posted this question already ,but I posted the wrong one.... Sets A,B and C are subsets of U. U= positive integers less than 16 A= prime numbers B= factors of 36 C= multiples of 4 (A intersect B)' INTERSECT C {?} I meant INTERSECT not union! My answer: 4,8,12

Chemistry
A solution formed by dissolving an antacid tablet has a pH of 9.18. Calculate [H+].

Chemistry
A solution formed by dissolving an antacid tablet has a pH of 9.18. Calculate [H+].

Math
a random sample of 28 patients across the country had an average cost of 5250 with a standard deviation of 629.at a= 0.025 can it be concluded that the mean is less than 5400

Help
If upon retirement in 20 years Greg plans to invest 800,000 in a fund that earns 4 percent, What is the maximum annual withdrawal he can make over the following 15 years

grammar
it should be related to a fantastic voyage --

Precalculus
For this problem I drew a Venn diagram.. Sets A,B and C are subsets of U. U= positive integers less than 16 A= prime numbers B= factors of 36 C= multiples of 4 (A intersect B)' union C {?} My answer: The apostrophe stands for negation! According to my Venn diagram, that me...

science: biology
they eat herbivores

science: biology
The hyena is a carnivore. Justin claims that hyenas need plants to survive, but Kaden says that they don't because they only eat meat. Who is correct and why?

math ratio
a:b = 10:15 b:c = 15:18 c:d = 18:48 a:b:c:d = 10:15:18:48

math
between 8:00 and 8:30, A has gone 15 km The speed difference B-A = 15 km/hr So, since B is 15km behind A at 8:30, it will take 1 hour to make up the distance.

CALCULUS
pi, not pai dx/dt = 12sin^2(t)cos(t) dy/dt = -21cos^2(t)sin(t) dx/dt and dy/dt are both zero when sin(2t)=0, or at multiples of pi/2. So, the open intervals are (0,pi/2),(pi/2,pi),(pi/3pi/2),(3pi/2,2pi). The graph bears this out: enter parametric plot x=4sin^3(t), y=7cos^3(t) ...

College algebra
This year the state highway department in Montana purchased 276 identical trucks for official use. The purchased price was 5,680,088. Due to budget shortfall next year the department plans to purchase only 69 cars and 119 trucks. It will be charged the same price for each car ...

informal logic
To criticize a deductive argument logically, one might:

ag 1
The average daily high temperature for the month of may in ocaia Florida is appromaimated by thee function. F(n)=0.2n+80. Where n is the day of the month

grammer
My sister and I share a three year age gap as she is twenty one while I am eighteen. how to improve this sentence

grammer
In addition to having common personality traits with my mother, I also play the same two instruments my mother did when she was young. How to improve this sentence?

Precalculus
Sets A,B and C are subsets of U. U= positive integers less than 16 A= prime numbers B= factors of 36 C= multiples of 4 (A intersect B)' union C {?} My answer: 1,4,5,6,7,8,9,10,11,12,13,14,15 union 4,8,12 {4,8,12}

Calculus Help Please Urgent!!!
a) Estimate the area under the graph of f(x)=7+4x^2 from x=-1 to x=2 using three rectangles and right endpoints. R3= ??? Then improve your estimate by using six rectangles. R6= ??? Sketch the curve and the approximating rectangles for R3 and R6? b) Repeat part (a) using left e...

English help
I'm writing an essay about something that is worth dying for. For me, something that is worth dying for is my religion. How would I write it about religion? Need help!!

chemistry
how many grams of HCL is needed to produce 200 grams of hydrogen?

Science
7.D 8.C

Science
my answers: 1.A 2.C 3.D 4.B 5.B 6.A 7.DC 8.

Science
1. If the net force on an object is O N, the forces are considered unbalanced true false 2. Most people in the united states use feet and miles to measure distance in their everyday lives. why do scientist in the United States use meters to measure distance? Meters allow scien...

Math
I'm extemely lost at some point, how do you solve this equation by using the inverse of the coefficient matrix and by echelon method -x-8y=12 3x+24y=-36

Language arts
If you had to write a creative story what would it be about?

finance
If the average new home costs $ 275,000 today, how much will it cost in 10 years if the price increases by 5 percent each year?

Math
3.14x8=your answer Pie times the radius

science
Why are there usually more producer in an ecosystem than consumers? a). There is less energy available to the consumers. b). There is more energy available to the consumers. My answer is ( a ).

physics
A stone is dropped from the deck of the bridge. The sound of the splash reaches the deck 3 seconds later. If sound travels at 342 m/s in still air, how high is the deck of bridge above the water?

Math
(2 + sqrt 2)/(2 - sqrt 2) = (x)/(3 + sqrt 10) How to solve for x?

Math
Thanks, but can you please verify how you got the (2√5 + 5)? Because I thought that √5 * (2+√5) would be 2√25.

Math
(sqrt 5)/(2 - sqrt 5)

chemistry urgent!
what is the net ionic for these following balanced equations: 2(NH4)3PO4(aq) + 3Ba(OH)2(aq) -> Ba(PO4)2(s) + 6H2O(l) + 6NH3(g) 2HNO3(aq) + K2CO3(aq) -> H2O(l) + CO2(g) +2KNO3 NaF(aq) + HCl(aq) -> NaCl(aq) + HF(aq)

Algebra 1
Yes.

business math
On May 1, Emerson Fast bought 10 Manitoba On May 1, Emerson Fast bought 10 Manitoba Polar bonds with a coupon rate of 7.875%. The purchase price was $101. 375, and the commission was $8 per bond. Manitoba Polar bonds pay interest on April 1 and October 1. Polar bonds with a co...

Algebra
The formula.

Algebra
That's exactly what it said in the textbook.

Algebra
The equation r = (sqrt A)/(pi) gives the radius r of circle with area A. What is the radius of a circle with the given area? Write your answer as a simplified radical and as a decimal rounded to the nearest hundredth. a. 50 ft^2

calculus help
At time t=0, an astronaut stands on a platform 3 meters above the moon's surface and throws a rock directly upward with an initial velocity of 32 m/sec. if the acceleration due to gravity is 1.6 m/sec^2. a) find the equations of motion for the throwing of this rock. -1. a(...

Math
Please Help!!

Math
It doesn't make sense!!!

Math
I did 175.2 multiplied by 0.7134 then I rounded to get 125. So I dont get how to get the answer!!!

Math
52

Math
During exercise, the recommended maximum heart rate in beats per minute is modeled by the formula M=176-0.8A, where M is the maximum heart rate and A is the person’s age. Approximately, at what age would you have a recommended heart rate in beats per minute of 125? A.52 y...

Math
Solve the equation and write the answer in simplified radical form. n^2 - 2n + 1 = 5

Math
(16a)/(sqrt 6a^3)

Math
M=11*

Math
Find the value of the variables in the table: X= n, 4, 6, 10, 12. Y= 1, 9, m, 21, 25 n=0 Y=11?

Algebra
Can you explain how we do that? Also, the answer key says ab^2 sqrt abc.

Algebra
(sqrt a^3 b^5 c^3)

Math
1.Which explains why the sequence 216, 12, 2/3 is arithmetic or geometric? A.The sequence is geometric because it decreases by a factor of 6. B.The sequence is arithmetic because it decreases by a factor of 6 C.The sequence is geometric because it decreases by a factor of 1/18...

Geometery help
Well, you move 5 units right and 5 units up. So, move five units up from (4,5), which is (4,10).

math
a person was climbing on a building. He slips 1 m for every 5 metre he climbs up. If the building is 53 m high and he takes 5 seconds to climb 1 metre find the total time taken by him to get on the top of the building.

math
represent an equivalent fraction to 3/4 as 1)a fraction and 2)a picture

environmental science
What are some of The Blue Plains Water Advanced Wastewater Treatment Plant standards of

trignometry
Tan4x=4tanx(1-tan^x)/1-6tan^x+tan^^x ,prove

Algebra
When a polynomial is divided by x+3, the quotient is x^3+x^2-4 and the remainder is 8. Find the dividend?

Algebra
(√(2m)^-3)/(m^-1)

Algebra
When a polynomial is divided by x+3, the quotient is x^3+x^2-4 and the remainder is 8. Find the dividend?

Calculus Help Please Urgent!!!
At time t=0, an astronaut stands on a platform 3 meters above the moon's surface and throws a rock directly upward with an initial velocity of 32 m/sec. if the acceleration due to gravity is 1.6 m/sec^2. a) find the equations of motion for the throwing of this rock. b) how...

chemistry
13. A student mixes 100.0 mL of 0.500 M AgNO3 with 100.0 mL of 0.500 M CaCl2. (8 points) a. Write the balanced molecular equation for the reaction. b. Write the net I onic equation for the reaction. c. How many grams of precipitate will form? d. What is the concentration of Ag...

Algebra
Find the constant c such that the denominator divides evenly into the numerator. (x^4 - 3x^2 + c)/( x+6)

Algebra
(√5a^-2)/(√10a^-1)

Music
So, I have to split a song into its form, like ABAA, ABBA, and so on. I need help with doing that to the song "Wake Me Up" by Avicii. I get confused whenever I try to. Please help me?

Math
360(degrees in a circle) 40(given) so 360/40=9 Multiply that by two(because theres two pizzas) so 18 people.

Math - Answer Check
Jeff hiked 2/3 distance from Lookout Point to Eagle Station then stopped for lunch. How far had he hiked? Lookout Point to Eagle Station: 2 1/10 I got 1 13/30 but it's not an answer choice.

Grammar
There are no such things as unicorns or ghosts. There are no such things as unicorns nor ghosts. Which sentence is correct?

Math
Thanks! I get it completely now :).

Math
How did √(3f^3) become f√(3f)? That's the part I'm confused about.

Math
How to simplify? (√3)/(√f^-3)

science
The link works for me. Anyway, if it does actually lead you to the homepage, then just search about the formation of the Andes Mountains on your own.

Algebra
How did you get the 1/(f√f)?

Algebra
How to simplify? (√3)/(√f^-3)

Chemistry
How many grams of sodium acetate, NaC2H3O2, would have to be added to 5.00 L of 0.65 M acetic acid (pKa 4.74) to make the solution a buffer for pH 4.00?

math
how do you make a coordinate plane for the function of a person who weighs 130 pounds that burns 300 calories in 1 hour,600 calories in 2 hours,900 calories in 3 hours and 1200 calories in 4 hours

Algebra
That's okay, I figured it out.

Algebra
How to simplify: sqrt(3x^3)/(64x^2) The whole thing is under the radical.

algebra
What is the y-intercept for line A, considering these answers (0,1/2),(1/2,0), (0,-1) and (-1,0).

algebra
What is the slope of line A if the answers are -2, 1/2, -1/2 and 2.

Algebra ll
thank you, Steve :)

Physics
A certain planet is located 3.54 x 10^11 m from its sun. If its orbital period is 4.9 x 10^7 s, find the mass of its sun.

math problem
what is 4/5 of 230

math
transversal

Chemistry
What is the azimuthal quantum number (also called the angular-momentum quantum number), ℓ, for the orbital shown here? (the photo is a d orbital. it has 4 balls around it) Express your answer numerically as an integer.

science
Birds share many different characteristics. List three of these.

Chemistry
An astrophysicist working at an observatory is interested in finding clouds of hydrogen in the galaxy. Usually hydrogen is detected by looking for the Balmer series of spectral lines in the visible spectrum. Unfortunately, the instrument that detects hydrogen emission spectra ...

Chemistry
6.626 x 10^-34/ m x 1.26 times 10^5 what is plugged in for the mass if it is not given?

Chemistry
What is the de Broglie wavelength of an electron traveling at 1.26×105m/s ?

trig
16cos(x)-3sec(x)=0 Find all solutions for x in [0, 2pi)

math
Kyle reduced his investment in Collins Company from $11,700 to $4,300. What was the percentage rate of decrease?

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