Monday
July 28, 2014

Posts by anonymous


Total # Posts: 70,595

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?

Math
A rectangular backyard measures 15 meters by 20 meters.there is a square flower bed in the middle of the yard with three sides of 3 meters.what is the area of the yard only?

Algebra
7(√6/32) I did: 7(√6/32) * (√32/√32) 7(√192/32) ...but then what?

Math
A sidewalk borders a rectangular play area.the play area measures 20ft by14ft.the width of the sidewalk is 2 ft.what is the perimeter of the outside borders of the sidewalk?

Biology help
How does a gene determine a trait?

Math
(6/7c)^2 Is this 6/7c^2?

Algebra
I multiplied (√6/√32) by (√32/√32).

Algebra
7(√6/32) I came until 7(√192/32). How do I proceed from here?

algebra
(12*50) + (16*50) = ?

algebra
Gabby walks 12 blocks east from school and then 16 blocks south and each block is 50 yards how far is Gabby from school in yards?

math
1third * 1 hafl

Math 70
At a county fair, an adult ticket sold for $6.00, a senior citizen’s ticket for $4.50, and a child’s ticket for $2.00. On Friday, the number of adults and senior citizen’s tickets sold was 5 more than the number of children’s tickets sold. The number of adu...

Physics
A golf ball, mass 0.048 kg, rests on a tee. It is struck by a golf club with an effective mass of 0.225 kg and a speed of 44 m/s. Assuming the collision is elastic, find the speed of the ball when it leaves the tee (remember: you can not assume the club is at rest after the co...

physics
Assume that the dots in the painting are separated by 1.0 mm and that the wavelength of the light is vacuum= 500 nm. Find the distance at which the dots can just be resolved by (a) the eye and (b) the camera. I know that the resolving equation is (angle)min = 1.22(wavelength) ...

Algebra
(-1/3)√18c^5 * (-6√8c^9) 2√144c^14 ---> I came until here but then didn't know how to proceed.

Science
We just learned about mitosis and my teacher is giving a test over it and other things tomorrow. We have to write the mitosis steps in order, label the chomatids, nuclear membrane, spindle fibers, and centrioles, and have a sentence describing them. How could I remember this?

calculus help for Steve
When I put your answer into WebAssign it marked as wrong so are you sure this is the right answer?

calculus help
A particle is moving with the given data. Find the position of the particle. a(t)= (t^2 - 5t +7) , s(0)=0 , s(1)=20 Thanks!

biology
GCCATGTT GCGTACTT C --> G A --> T T --> A G --> C all of these are transversion (pyrimidine changing to purine)

science
A bat moving at 5.6 m/s is chasing a flying insect. The bat emits a 60 kHz chirp and receives back an echo at 60.63 kHz. At what speed is the bat gaining on its prey? Take the speed of sound in air to be 338 m/s. Answer in units of m/s

Math
(-1/3)√18c^5 * (-6√8c^9) 2√144c^14 ---> I came until here but then didn't know how to proceed.

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