Sunday

October 23, 2016
Total # Posts: 2,426

**Physics**

when a .187 kg mass is attached to a vertical spring it causes the spring to stretch distance d. if the mass is now displaced slightly from equilibrium, it is found to make 223 oscillations in 157s. Find the stretch distance d.

*February 28, 2011*

**Trigonometry /Logarithms (brace yourself)**

This is an outline that i have to use to find the solution of the question. It involves logarithms and half-angle formulas.I have worked though it but got stuck on some parts. I'd like if you look over my work. solve the triangle for which given parts are a=27 ,b=21 ,c=24 ...

*February 28, 2011*

**trigonometry **

an example problem showed the following log tan A/2 = 9.54435 - 10 A= 38 deg 36' 12" Now i want to do the same. log tan A/2 = 9.85551 - 10 A= ?? I don't know how to convert tan into degrees can you help me.

*February 27, 2011*

**Writing **

okay i have this writing assignment on how drunk driving can be stopped .. i have like three sentences to complete it and these three sentences are to explain how/what harsher penalties can help in stopping drunk driving.. I'm stuck because the following are already the ...

*February 27, 2011*

**cosines**

I don't know how to reverse cosine decimals into angles. Can you please explain and help me solve these . cos A= 0.28571428571 A= cos B= 0.66666666667 B= cos C= 0.5238089523

*February 27, 2011*

**trigonometry (repost) Mathmate**

Use logarithms and the law of tangents to solve the triangle ABC, given that a=21.46 ft, b=46.28 ft, and C=32°28'30" Using the previous values, a=21.46 b=46.28 C=32-28-30=32.475 We have A+B=180-32.475=147.525 a+b=67.74 a-b=-24.82 tan((A+B)/2)=3.433633 tan((A-B)/2...

*February 27, 2011*

**trigonometry **

Use logarithms and the law of tangents to solve the triangle ABC, given that a=21.46 ft, b=46.28 ft, and C=32°28'30" I have to use logarithms and law of tangents . and then provide the check. which says law of sine or mollweids equation. I can't us the cosine ...

*February 26, 2011*

**trigonometry (repost) Mathmate**

I want to start by saying thank you . You have no idea how much u have helped me understand logarithms, even better then the books i have (it poorly explains the subject of trigonometry let alone logarithms and antilog). Your last explanation was very clear and i even ...

*February 26, 2011*

**trigonometry **

Use logarithms and the law of tangents to solve the triangle ABC, given that a=21.46 ft, b=46.28 ft, and C=32°28'30" Also Give checks. I know the use of logarithms is unnecessary but i have to show my solution by using logarithms and thats the only reason I'm ...

*February 24, 2011*

**Algebra 2**

In Kentucky, where i am from, we do algebra and algebra two before pre-cal and calculus. I didn't realize that the problem could be solved in multiple ways and i apologise. But the solution should be done without calculus.

*February 24, 2011*

**Algebra 2**

I already looked over what you had posted. Unfortunatly, i didn't quite understand what you had said.

*February 24, 2011*

**Algebra 2**

A company charges 16$ for a subscription. It has 30,000 subscribers. It looses 1,000 subscribers for every 1$ they raise the price. 1.Find the quadratic quation. (Can you tell me how to pull the numbers out of the question and put it into the equation?) Find the rate at 16$. (...

*February 24, 2011*

**Science**

Sand is silicon dioxide, or SiO2, therefore you must be Silcon or Si.

*February 24, 2011*

**Trigonometry (Logarthims) **

Give checks to the following two questions Use logarithms and the law of tangents to solve the triangle ABC, given that a=21.46 ft, b=46.28 ft, and C=32°28'30" without logarithms i can do this problem easily and i have. but when i try solving it with logarithms i...

*February 24, 2011*

**trigonometry**

Can you please show me the steps: Derive the identity for sin 3x in terms of sin x.

*February 24, 2011*

**trigonometry**

255 i guess that makes the first 1 wrong.

*February 23, 2011*

**trigonometry**

or sin (255°) = sin (180° + 75°) = - sin 75° [The terminal side of the angle lies in quadrant III, so the sine function is negative.] = - sin (45° + 30°) = - (sin 45°cos 30° + cos 45°sin 30°) [Use sin (A + B) = sin A cos B + cos A sin B...

*February 23, 2011*

**trigonometry**

is this correct? sin 255degrees 225 = 180 + 45 sin(225) = sin(180 + 45) = sin(180)cos(45) + cos(180)sin(45) sin(225) = 0 + (-1)(sqrt2/2) sin(225) = -(sqrt2)/2

*February 23, 2011*

**please please i need more ideas in the answer**

write a single paragraph which answers this question, “Who is responsible for program planning, the academic advisor or the student? Explain why.”

*February 22, 2011*

**trigonometry**

how can i find the anti-logarithm of this number. 5.07843058944 it should be 59477.5 can show me how.

*February 21, 2011*

**trigonometry (MathMate)**

okay i was able to get c*sin(A)= 1.8555387 but i was lost after that. I couldn't reproduce the same answers u have. value logarithm c 2.6294096 sin(A) 1̅.8555387 2.4849483 [ADD] sin(C) 1̅.9809493 a 2.5039990 [SUBTRACT] Anti-log 319.1530 (length of c)

*February 21, 2011*

**trigonometry (MathMate)**

MathMate i would really appreciate if you can show me where the logarithms can be used.I know they are unnecessary and I already found the answer without them but i still have to show my work using logarithms and they just confuse me. I also have most trouble woth the anti-...

*February 21, 2011*

**trigonometry**

1. Finde the area of the following tringles: (use Logarithms) A) a=12.7, b=21.5, c=28.6. i'm not of the answer i got. i got 127.6 if you got something different can you show me how you did while using logarithms.

*February 21, 2011*

**trigonometry**

is there anyway i can use logarthims in this problem?

*February 20, 2011*

**trigonometry**

i used cosin and got that answer .. I'm i wrong .

*February 20, 2011*

**trigonometry**

anyways the area would be 312,918.8

*February 20, 2011*

**trigonometry**

i don't know why its asking the url

*February 20, 2011*

**trigonometry**

C = 180 - A - B = 180 - 45° 48' 36" - 61° 2' 13" = 73° 9' 11" Law of sines: a/sinA = c/sinC a = c.(sinA/sinC) = 426.(sin(45° 48' 36"))/sin(73° 9' 11")) a = 426*0.749186 a = 319.153

*February 20, 2011*

**trigonometry**

okay so i have this trigonometry problem were i HAVE to use logarithms. Now this is my work but can u help me solve it using logarithms. Find the area of the following triangles:(use logarithms) 1) c=426, A=45degrees 48' 36",and B=61degrees 2' 13"

*February 20, 2011*

**trigomometry**

Thank you !

*February 20, 2011*

**trigomometry**

I don't think its right . can you correct me please . A.log sin A = 9.91655 - 10 sinA = 0.82537 A = 55.626° = 55° 34' 35" B.log cot A = 0.11975 cot(A) = 1.317498... A = 37.199 degs A = 37º 11' 56"

*February 20, 2011*

**trigomometry**

I don't think its right . can you correct me please . A.log sin A = 9.91655 - 10 sinA = 0.82537 A = 55.626° = 55° 34' 35" B.log cot A = 0.11975 cot(A) = 1.317498... A = 37.199 degs A = 37º 11' 56"

*February 20, 2011*

**sciencce**

Mrs. Scheib was riding her bike and leaves home and rides due east for a distance of 45 km. she returns home on the same bike path. if the entire bike path takes 4 hrs what is her average speed? Is it 11.25?

*February 17, 2011*

**list some harmful effects of plagiarism.**

please ineed answer for this question by his or her own word list some harmful effects of plagiarism. In other words, explain what is morally wrong with plagiarism. How does plagiarism harm the perpetrator? thank you

*February 16, 2011*

**program planning**

write a single paragraph which answers this question, “Who is responsible for program planning, the academic advisor or the student? Explain why.”

*February 15, 2011*

**trigonometry**

can you correct the rest for me please? Express each as a function of theta: a. sin (270deg + theta)= cos theta b. cos (pi + theta)= -cos theta c. tan (810 + theta)= ????? d. sin (theta - 180)= -sin theta

*February 11, 2011*

**gr.10 math**

could you please show me the steps to solve this equation?I looked at the answer in the back of our textbook but i keep getting the wrong answer. 5(2y+1)-(5y-2) answer=5y+7. thanks so much!

*February 11, 2011*

**Math**

R(p) = p - 0.08p - 1200

*February 9, 2011*

**Math**

Add the two equations to form one equation.

*February 9, 2011*

**Algebra**

Area = pi * r^2 diameter = 2r, r = d/2 d = 10x, r = 10x/2 = 5x A = pi * (5x)^2 A = 3.14 (25x^2) A = 78.5 x^2

*February 8, 2011*

**pre cal**

If you sketch this out you will have a right triangle, I will call ABC. A is the vertex = angle of depression AC (side b) = base = 1400 feet BC (side a) = leg = 1100 feet AB (side c) = hypotenuse = distance to landing site To find angle A (angle of depression) tan A = a/b = ...

*February 8, 2011*

**Algebra 1**

Solution, x <= 10/3 and y < 5 - x/2 x > 10/3 and y < -2(x - 5) Google for an online graph calculator. You will be able to input the equations and the program will show you a graph.

*February 8, 2011*

**geometry**

The ratio of the sides of the 1st triangle is, 3 : 4 : 6 The second triangle is x : x : 15 6 : 15 = 3 : x 6/15 = 3/x cross multiply 6x = 45 x = 7.5

*February 8, 2011*

**math**

8/8 - 3/8 = 5/8 To find the percent, 5 divided by 8 = 0.625 * 100 = 62.5%

*February 8, 2011*

**Math**

Maybe if you would repost (again) and this time proofread for nonsense symbols that only you know what they mean. What is "x1,x2¡¦¡¦¡¦¡¦¡¦x11.(Thus,-2 is labeled x1,82 is labeled x2 and so on.) find ¢&...

*February 8, 2011*

**Jiskha**

Why would you need to do this? Were you looking for test answers? I don't mean to infer you were cheating, but I cannot think of any other reason you would need to remove questions asked.

*February 8, 2011*

**Chemistry**

Describe how to prepare 5.00 liters of a 5.00 % (w/w) NaCl solution, which has a density of 1.06 g/mL, from pure solid sodium chloride. I have no idea how to find the starting measurements please help!

*February 6, 2011*

**physics**

a framed picture of weight 15N is hung on a wall, using a piece of string. The ends of the string are tied to two points, 0.60 m apart on the same horizontal level, on the back of the picture.Find the tension in the string if the string is 1.0m long

*February 6, 2011*

**trigonometry**

can you correct the rest for me please? Express each as a function of theta: a. sin (270deg + theta)= cos theta b. cos (pi + theta)= -cos theta c. tan (810 + theta)= ????? d. sin (theta - 180)= -sin theta

*February 5, 2011*

**trigonometry**

Express as a function : c.tan (810degrees + theta ) I'm confused between two answers . 1. that it would be tan 90 deg (which is undefined) 2. it would be cot theta ?? can you tell me what i should do to get the right answer.

*February 5, 2011*

**Physics**

BUMP!

*February 5, 2011*

**math**

Well, 'biscet' is not a word and FGH could be just about anything. Your question is not clear.

*February 2, 2011*

**math**

Buy him a drink?

*February 2, 2011*

**Calculus**

f(x)= x^2 + bx + 1 on [-1,1] First, integrate | = integration symbol |x^2 + bx + 1 = 1/3 x^3 + 1/2 bx^2 + x + C Evaluate from -1 to 1 1/3 x^3 + 1/2 bx^2 + x + C 1/3 (1)^3 + 1/2 b(1)^2 + 1 - (1/3 (-1)^3 + 1/2 b(-1)^2 - 1 1/3 + 1/2 b + 1 - (-1/3 + 1/2 b - 1) 1/2 b + 4/3 - (1/2 b...

*February 1, 2011*

**algabra**

D = RT (Distance = Rate x Time) T = D/R T = 960/70 T = ? T = 960/75 T = ?

*February 1, 2011*

**Math**

4x^4 - 6x^2 + 2 2(2x^4 - 3x^2 + 1) 2(2x^2 - 1)(x^2 - 1) 2(2x^2 - 1)(x - 1)(x + 1)

*February 1, 2011*

**Spanish-7th grade**

What are you doing Monday at 10 o'clock? I Study. I write. I listen to the teacher. I watch television.

*February 1, 2011*

**Finance**

If simple interest, I = PRT I = 25000(0.07)(4) I = ? 25000 + ? (interest) = value in 4 yrs

*February 1, 2011*

**Algebra**

(4x^6)(-3x^9)(6x^7) 4 x -3 x 6 = -72 x^6 * x^9 * x^7 = x^22 (add the exponents) (4x^6)(-3x^9)(6x^7) = -72x^22

*February 1, 2011*

**english- to kill a mocking bird**

in the book to kill a mocking bird by harper lee, what did Atticus learn, i have been searching everywhere and cannot find the answer, PLEASE HELP:(

*January 30, 2011*

**English**

YOU'RE A LIAR!!!! THOSE ARE NOT "88.2" ANSWERS!!!!! THAT WAS A 29.3 ANSWERS!!!!!! U SUCK

*January 28, 2011*

**trigonometry plz explain.**

Which way is done correctly and why ?? Express the following in degrees,minutes, and seconds: (1)4 --> (180/pi)*4 = 229.18312 229.18312 = 229 + (0.18312*60) = 229 degrees + 10.9872' = 229 deg 10' + (0.9872*60)" = 229 deg 10' + 59.2" or (2)4*180/pi = ...

*January 26, 2011*

**trigonometry??**

Did I do this right???? Express the following in degrees,minutes, and seconds: a.4 --> (180/pi)*4 = 229.18312 b.0.23 --> (180/pi)*0.23 = 13.17803 c.pi(3.14159)/6 --> (180/pi)*(pi*3.14156/6) = 94.24778 d.3*pi/2 --> (180/pi)*(3pi/2) = 270 e.-1.4 --> (180/pi)*-1.4...

*January 26, 2011*

**Trigonometry **

Express the following in radians: f.1025degrees. --> (pi/180)*1025 = -185pi/36 Is that correct or theirs another way to do it ??

*January 24, 2011*

**PHYSICS**

A harmonic wave on a string moves along the x-axis according to: î(x,t) = 5.0 (cm) sin[ (2.5m-1) x - (63s-1) t ] At x = 1.0 m when t = 2.2 s the speed of the oscillations on the string is closest to ... 25.2 m/s 4.55 m/s 3.15 m/s 2.27 m/s 1.67 m/s

*January 23, 2011*

**physics**

At a distance of 30 m the noise from the engine of an jet has an intensity level of 130 dB. At this level, you will be in pain and your ears will hurt. That's why this intensity is know as the "pain threshold". How far do you have to be from a jet (total distance...

*January 23, 2011*

**Trigonometry **

Express the following in radians: f.1025degrees. --> (pi/180)*1025 = -185pi/36 Is that correct or theirs another way to do it ??

*January 23, 2011*

**physical**

A harmonic wave on a string moves along the x-axis according to: î(x,t) = 5.0 (cm) sin[ (2.5m-1) x - (63s-1) t ] At x = 1.0 m when t = 2.2 s the speed of the oscillations on the string is closest to ... 25.2 m/s 4.55 m/s 3.15 m/s 2.27 m/s 1.67 m/s

*January 23, 2011*

**physical**

At a distance of 30 m the noise from the engine of an jet has an intensity level of 130 dB. At this level, you will be in pain and your ears will hurt. That's why this intensity is know as the "pain threshold". How far do you have to be from a jet (total distance...

*January 23, 2011*

**Trigonometry **

showed me below where ??

*January 23, 2011*

**Trigonometry **

Express the following in radians: a.135degrees. --> (pi/180)*135 = how can i end up with a fraction answer?? b.-15degrees. --> (pi/180)* -15 = same here what are the steps to do next to get a fraction answer.

*January 23, 2011*

**ALGEBRA**

What exactly is "help properly"? He/she explained how to do this problem. Do you expect the problem to be done for you? "You need to attempt these questions yourself if you expect to learn anything." This is a true statement.

*January 23, 2011*

**MATH**

Do you mean, x^4 - x^2 - 6 This was answered the first time you posted it. I pasted the answer here for you. (x^2 - 3)(x^2 + 2)

*January 23, 2011*

**geometry**

una piramide cuadrangular?

*January 23, 2011*

**beginning algebra**

I got 1 +or- the sqrt 90/2

*January 22, 2011*

**beginning algebra**

Solve the equation (u-1)^2=2u^2-3u-29 for u .

*January 22, 2011*

**College Algebra**

Just not good at division

*January 22, 2011*

**College Algebra**

Divide. (9x^3-10+19+6x^4)/(-2x^2+3x-3) Write your answer in the form Q(x)+ R(x)/ -2x^2+3x-3, where Q(x) is the quotient and R(x) is the remainder.

*January 22, 2011*

**beginning algebra**

Solve the equation (u-1)^2=2u^2-3u-29 for u .

*January 22, 2011*

**beginning algebra**

Find the least common multiple of the two expressions 15v^4w^8 and 9vw^5x^4

*January 22, 2011*

**beginning algebra**

Solve for y. Write answer in simpliest form. 2+7/y=3/5

*January 22, 2011*

**math**

P = 2L + 2W W = 25 L = 50 P = 2(50) + 2(25) P = ? solve

*January 20, 2011*

**math**

16.8/72 = .23 please, where did you get 4.286?

*January 20, 2011*

**Trig**

Hi everyone, I have a WS due tomorrow, and would really appreciate some help. You are taking a ride on a Ferris wheel that is 100 feet in diameter and has a bottom point that is 10 feet above the ground. Suppose that the wheel rotates four times every minute and from your ...

*January 20, 2011*

**Chemistry**

If water I'd added to magnesium nitride, ammonia gas is produced when the mixture is heated Mg3N2 (s) + 3H2O (l) ----> 3MgO) (s) + 2NH) (g) *Only the numbers at the beginning aren't subscripts* If 10.3 g of magnesium nitride is treated with water, what volume of ...

*January 19, 2011*

**Chemistry**

Determine the pressure in a 125-L tank containing 56.2 kg of oxygen gas at 25 °C. So, PV=nRT I convert 25 °C to 298.15 K Do I have to convert anything else? What else do I do?

*January 19, 2011*

**Chemistry Lab**

1.312E03

*January 17, 2011*

**Combinatorics**

In how many ways can 8 students be assigned to 2 groups if each group must have at least 3 students?

*January 17, 2011*

**Ochem**

For the reaction between chloroacetic acid and 4-chlorophenolate to synthesize 4-chlorophenoxyacetic acid, why is this reaction a sn2 reaction?

*January 15, 2011*

**trigonometry**

can you explain to me in details please of how these type of questions can be answered without using a calculator to find the direct answer. Find the following functions correct to five decimal places: a. sin 22degrees 43' b. cos 44degrees 56' C. sin 79degrees 23'...

*January 13, 2011*

**trigonometry**

sinA= 3/5 and C=17 Finding a and b

*January 12, 2011*

**trigonometry**

sinA= 3/5 and C=17 Finding a and b Their two triangles and i have to find the ratio i just can’t seem to set up the problem right but i gave an example of one of the practice exercise that dealt with finding only (a) so i got confused with finding a and b in that question...

*January 12, 2011*

**trigonometry.**

b= sqrt 17^2 - 10.2^2 = 13.6 ??

*January 10, 2011*

**trigonometry.**

sinA= 3/5 and C=17 Finding a and b would this work as an answer ..? sinA = opp/hyp = a/c = 3/5 = 3*3.4/5*3.4 = 10.2/17 a = 10.2 Applying Pythagoream Theorem a^2 + b^2 = c^2

*January 10, 2011*

**trigonometry.**

In a right triangle sinA= 3/5 and C=17. Find a and b. Be sure to draw a right triangle and letter it properly. how can i solve the math in this problem. i know i would have to use the Pythagoream Theorem but i don't know how to set the problem up first.

*January 10, 2011*

**Physics**

Does the frequency of light change as it enters a different substance? I know that the speed changes. The question might seem easy, but I have contradicting notes, so I'm confused.

*January 6, 2011*

**Trigonometry**

``(please show the steps to how the problems were solved) Using exact values, find the value of: A.12sin 30 degree - 6 tan 45 degree + sec 45 degrees/ 52 B.Sin2A + tan3A/2 - cos A + sec(a+ 15), when A=30degrees

*January 6, 2011*

**Trigonometry**

I need to show my work so i cant use a calculater . did i show it correctly?

*January 1, 2011*

**Trigonometry**

Please review and tell me if i did something wrong. Find the following functions correct to five decimal places: a. sin 22degrees 43' b. cos 44degrees 56' c. sin 49degrees 17' d. tan 11degrees 37' e. sin 79degrees 23'30' f. cot 19degrees 0' 25'...

*January 1, 2011*

**re post Trigonometry**

hopefully this will post more clearly! 12sin 30 degree - 6 tan 45 degree + sec 45 degrees/ 52 = 12¡¤1/2 -6¡¤ 1 + ¡Ì2/52 = ¡Ì2/52 Sin2A + tan3A/2 - cos A + sec(a+ 15)= ¡Ì3/2 + 1 - ¡Ì3/2 + ¡&...

*January 1, 2011*