Thursday

August 27, 2015
Total # Posts: 1,187

**Math (Trigonometry)**

What is the maximum value of [9sinθ+2sin(θ+π/3)]^2?
*May 9, 2013*

**Math (Probability)**

Four players are playing a game involving choosing positions on a grid of size 3×8. Each player chooses a random position on the grid, then all players reveal their choices and a token is placed on each of the positions. The probability that the tokens form the vertices ...
*May 7, 2013*

**Math (Percentage)**

The price of a hat is reduced by a% from its regular price, and then is raised by a% from the reduced price. If the resulting price is an 81% discount from the regular price, what is a?
*May 7, 2013*

**Math (Trigonometry)**

θ is an acute angle such that tan(θ) = 12. What is the value of 5√5⋅(sinθ+cosθ)?
*May 7, 2013*

**Math (Trigonometry)**

In triangle ABC, we have AB = 16, BC = 29 and CA = √1097. What is the integer that is closest to 100 sin∠ABC?
*May 7, 2013*

**Science**

Identify six renewable (as opposed to depleted) sources of energy.
*May 2, 2013*

**Math 112**

for either standard form of the parabola, describe what happens to the shape of the parabola as p increases
*April 29, 2013*

**Math**

A rectangular livestock pen with THREE SIDES of fencing is to be built against the barn. The fencing is 1050ft long. Find the dimensions of the maximum area that can be enclosed. What is the maximum area?
*April 23, 2013*

**math**

A child’s kite is on top of a straight pine tree. A ladder is placed against the tree and touches the kite. The ladder forms a 45-degree angle with the flat ground. The base of the tree is 9 feet away from the base of the ladder. With only this information, how can you ...
*April 19, 2013*

**english**

how to do i do good on a ela multiple choice comprehension test. like can you give me some tips?
*April 15, 2013*

**Maths**

The first one can be any color. But after you draw it there will be only 9 of that color left. So the odds of drawing the same color again are 9/39.
*April 15, 2013*

**PHYSICS**

If you need me to show you how i can
*April 14, 2013*

**PHYSICS**

I dont know why that just happened?!
*April 14, 2013*

**PHYSICS**

How are you in sixth grade and doing these questions?! You must be really smart!
*April 14, 2013*

**PHYSICS**

The answer is 7m for the first one and B is yes she will
*April 14, 2013*

**mathematics**

Need help with these: Write the expression as a logarithm of a single quality. a) 3log[base5](a) + 4log[base5](b) - 2log[base5](c) b) 3log(2)-(1/3)log((x)^(2) - 1) I appreciate help.
*April 8, 2013*

**algebra**

Tom decides to make a rectangular desk top from a plywood door that was stored in the basement. The door was 2 feet longer than twice its width. To get the desired size desk he cuts 3 inches off its length and 1/2 foot off its width. If the plywood he cut off had a total area ...
*April 6, 2013*

**math**

find the value of k such that the equation e^(2x)=krootx has exactly one solution.
*April 4, 2013*

**math**

What is the value of u in the following system of linear equations? 4u + 3v = –1 3u + 2v = 1 a) 5 b)-11/2 C)-7 d)19/3
*April 2, 2013*

**math**

What is the value of t in the solution to this systems of linear equations? 2s – 3t = –1 3s – 4t = 0 a)–5 b)3 c)-7/3 d)4
*April 2, 2013*

**math**

What is the value of t in the solution to this systems of linear equations? 2s – 3t = –1 3s – 4t = 0 a)–5 b)3 c)-7/3 d)4
*April 2, 2013*

**la**

do you want our opinion for that?
*April 2, 2013*

**math**

Flight Path. In this problem you will use a cosine function to model the flight path of a plane that begins its descent from 20000 ft when it is 45 miles from the airport. Find the fuction p(x)= ACos(wx)+B that that gives the altitude in ft when the plane is x miles from the ...
*April 2, 2013*

**college algebra**

How much paper would you need to wrap a box 10cm wide, 25cm high, and 50cm long?
*April 2, 2013*

**calculus **

Flight Path. In this problem you will use a cosine function to model the flight path of a plane that begins its descent from 20000 ft when it is 45 miles from the airport. Find the fuction p(x)= ACos(wx)+B that that gives the altitude in ft when the plane is x miles from the ...
*April 1, 2013*

**math**

so there's a total of 15 marbles and there's 6 yellow marbles. thus the probability is 6/15
*April 1, 2013*

**math**

A firm issues bonds with a face value of 1000, a coupon rate of 7% and that will mature in 10 years and the market yield is 10% and pay interest semiannually what is the value. Please help
*March 31, 2013*

**math**

If a company issues bonds with a face value of $1000, a coupon rate of 7%, and that will mature in 10 years. The current market yield is 10%. if the bonds pay interest semiannually, what is the value of the bonds? please he;p with the formula?
*March 30, 2013*

**math**

If I need $25,000 in 4 years. Waht amount must i invest today if the investment earns 12% compounded semiannualy?
*March 30, 2013*

**Calculus 2**

Hello, I don't know what test to use for this series: Determine the sum of the following series: inf E n=1 (2^n + 9^n) / 12^n thank you!
*March 22, 2013*

**am literature**

what does ethos pathos and logos mean
*March 17, 2013*

**Math**

Randy throw a base ball straight upwards, releasing it 6 ft above the round, and giving it an initial speed of v = 128 ft/sec. Use the formula h = -16t^2 + vt + 6 ft( where t = time , h = height ) to find the maximum height of the ball to reach this height.
*March 15, 2013*

**math**

a factory can produce 45 containers of yogurt in t minutes, 950 grams of fruit are used for every 25 containers of yogurt b) find in terms of t the time taken by the factory to produce 100 containers of yogurt c) if t=6 find the amount of fruit used in producing containers of ...
*March 5, 2013*

**maths and physics**

A cannon is placed on a hillside pointing up the hill, where the hill is at an angle a Pi/4 to the horizontal. The cannon points at an angle Pi/6 to the slope. and a shot is red uphill with initial speed v0. (i) Find the maximum value of the distance between the ...
*March 3, 2013*

**physics**

A truck of mass 13,100 kg is acted upon by a driving force of 8900 N. The motion is opposed by a frictional force of 2230 N. Find the acceleration.
*March 3, 2013*

**physics**

20 m/s 2 J
*February 25, 2013*

**calculus 2**

thanks steve!
*February 23, 2013*

**calculus 2**

integrate e^(2x) / (e^(4x) + 9) am I allowed to simplify the e^(2x) with the e^(4x)? Thank you
*February 23, 2013*

**I need help**

this is the Answer jiskha try it
*February 23, 2013*

**I need help**

1:compare and contrast 2:Taxies represent the modern world 3:things that we might not value until it’s too late 4:Nicole and Camille left work, went to the gym, and ate dinner before 7 p.m. 5:intercontinental
*February 23, 2013*

**trig sub question**

thank you Steve
*February 22, 2013*

**trig sub question**

Hello, I have a question concerning trigonometric substitution. let's say we have integral of dx/sqrt(9x^2 + 4), so after doing a few steps we have: 2/3 integral of sec0/sqrt((2tan0)^2 + 4*) d0 (the * is for later on) the next step turns into: 2/3 integral of sec0/(sqrt(...
*February 22, 2013*

**Math**

it was not negative that was a subtraction sign
*February 20, 2013*

**Math**

so lets say i had 4w-8-1w i take 4w+1w= 5w then i have -8 left and i do 5w-8
*February 20, 2013*

**Math**

help me combine like terms. like how do you do it with different signs in the problem. 17 + 4w - 12 - w
*February 20, 2013*

**marketing**

what is market segmentation
*February 19, 2013*

**math**

If the digits of a number may be any one of 0 through 9 (except the first digit cannot be zero), and the system of alternating signs of coefficients is used to create a polynomial, what is the least number m of real zeros the polynomial can have? What is the greatest number M ...
*February 11, 2013*

**math**

A box with an open top is to be constructed from a rectangular piece of cardboard with dimensions W inches by L inches by cutting out equal squares of side x at each corner and then folding up the sides. (W = 12 in. and L = 20 in). Find the values of x for which the volume is ...
*February 9, 2013*

**math**

I am a 2-digit number with a 1-digit decimal. I am bigger than 54 but smaller than 56. 2 of my digits are even. When you divide my whole number by the digit in my decimal place, the answer has no remainder. What are the biggest and smallest numbers I could be?
*February 5, 2013*

**Calculus 2**

thanks!
*February 2, 2013*

**Calculus 2**

I have this integral that I don't know how to solve: ∫ (x-3)/sqrt(x) Would I multiply both parentheses first? or just turn it into (x-3)(x^-0.5)?
*February 2, 2013*

**calculus**

okay so there must be a mistake with the system, thanks for clearing that up Damon.
*February 2, 2013*

**calculus**

Using an upper-case "C" for any arbitrary constants, find the general indefinite integral ∫ (-2-t)(-9-t^2) dt Now I multiplied both parentheses to get: ∫ (18 + 2t^2 + 9t + t^3) dt now I integrated and got: 18t + 2t^3/3 + 9t^2/2 + t^4/4 + C but I'm ...
*February 2, 2013*

**Math**

2x-5=39 2x=39-5 2x=34 x=17
*January 29, 2013*

**math**

come on i waitied almost for 20 minutes and this is what i get. -_- not cool
*January 29, 2013*

**math**

A park ranger finds that 35% of the park visitors stay at the campground. Of 105 visitors stayed at the campground in one day, how many visitors did the park have that day? i got 36.75 people and then i rounded and got 37 people.
*January 29, 2013*

**calculus**

Thank Steve. But how do you get 60 or 70? or the -1?
*January 28, 2013*

**calculus**

it's integral, not interal, sorry for the mistake
*January 28, 2013*

**calculus**

find the derivative of: g(x) = interal(a=7x, b=6x) (u+5)/(u-5) du Hint: interal(a=7x, b=6x) (u+5)/(u-5) du = interal(a=0, b=6x) (u+5)/(u-5) du + interal(a=7x, b=0) (u+5)/(u-5) du
*January 28, 2013*

**math**

EXPLAIN HOW YOU CAN BREAK 6X7 ARRAY IN TO SMALLER ARRAYS .WHAT ARE THE NEW FACTS?
*January 28, 2013*

**Physics**

pickett!!!
*January 27, 2013*

**math**

If a farm as 13 heads and 36 feet. How many chicken are there and how many rabbit are there?
*January 25, 2013*

**math**

If a farm as 13 heads and 36 feet. How many chicken are there and how many rabbit are there?
*January 25, 2013*

**physics**

nevermind, got it, had to switch calculator from degrees to radian, hehe
*January 23, 2013*

**physics**

The displacement of a particle in centimeters is given by y=8 sin (2πft). If f=20 Hz, find the displacement and the velocity of the particle at a time t=0.01 s and 0.07 s. (ans: y=7.61 cm, v=3.11 m/s, y=4.70 cm, v= -8.13 m/s) After I plug in f to get w and switch to this ...
*January 23, 2013*

**ANSWER MY QUESTION **

IS AN ATOM AN ELEMENT
*January 22, 2013*

**chemistry **

is a element an atom?
*January 22, 2013*

**math help**

340-127=213pages in the morning before the afternoon 253-213=40pages read in the afternoon
*January 22, 2013*

**Pol 201 American National Goverment**

some of these answers are wrong, do not trust them.
*January 20, 2013*

**Physics**

Suppose you have a very long straw that can reach from a cup of water on the ground level to the top of a very tall building. When you use a pump to suck on the straw in order to bring water up, a. you can bring the water up to any height with no problem. b. you can bring the ...
*January 18, 2013*

**Pre-Algebra**

3.25 for one batch of cookie 16.5/3.25= ___ batches of cookies
*January 17, 2013*

**math**

x=5 6x5=30+4=34
*January 17, 2013*

**science**

nvm i see it
*January 17, 2013*

**science**

Au-gold ag-sliver sn-tin hg-mercury pb-lead k-potassium w-tungsten fe-iron that's not what i meant. what does each abrevation mean in latin? the orgin name?
*January 17, 2013*

**science **

What are the orgin names for these abbreviation? in latin Au-gold ag-sliver sn-tin hg-mercury pb-lead k-potassium w-tungsten fe-tron
*January 17, 2013*

**Physics**

I should indeed have formulated this a lot clearer. I have done an experiment in which I add a stationary point to the standard pendulum situation, which creates a period function dependent on both the length of the pendulum as on the height of the stationary point which ...
*January 7, 2013*

**Physics**

Hello everyone, I have made measurements of the periods of a pendulum attached to a stationary point at a certain height h. When plotting the periods as a function of the square root of the length minus the height it gives us a straight line. I now need to prove that this line...
*January 7, 2013*

**Chemistry**

How many joules ar required to heat a frozen can of juice (360 grams) from -5 degrees C (the temp of an overcooled refrigerator) to 110 degrees C (the highest practical temp within a microwave oven)?
*January 5, 2013*

**math**

A video rental store has 1,234 videos on the shelves. OF the videos 1/3 were rated PG and 1/2 were rated PG-13. What equation can be used to find v, the total number of PG and PG 13 videos in the store?
*December 29, 2012*

**math**

if A [] B = A^B-(A+B), 7 [] 9 = ?
*December 25, 2012*

**maths**

Express sin 2x cos 4x as a sum of trigonometric functions
*December 24, 2012*

**maths stats**

For each day of the 5-day working week Tom can choose any one of 6 newspapers to read at the lunchtime. (i) How many different choices are possible in a week? (ii) If Tom wants to read a different title each day, then how many different choices are possible in a week?
*December 23, 2012*

**Physics**

Amy age 8 27kg 127cm Bruce age 12 41kg 149cm Both Amy and Bruce are learning gymnastics and having trouble being able to get enough height and time in the air to do a back somersault without the coach spotting them. The coach gives them homework to just focus on jumping ...
*December 15, 2012*

**math problem**

To make an orange dye, 4 parts of red dye are mixed with 3 parts of yellow dye. To make a green dye, 2 parts of blue dye are mixed with 1 part of yellow dye. If equal amounts of green dye and orange dye are mixed,___________ of this mixture is composed of yellow dye.
*December 13, 2012*

**math**

According to the statistics of a famous high school in Canada, all their graduates went to either A or B for university study. Following are the proportions of graduates who went to the two universities. University Proportion A 1-k B k Suppose k = 0.4 (a) What is the standard ...
*December 9, 2012*

**Alegbra 1**

Mr. Jones got his car washed at super clean. The wash started at 1:55pm and ended at 2:05pm. It cost $7. Mr. Smith got his car washed at Super Clean for $12. the wash started at 9:30am and ended at 9:50 am. Write an equation for the line that represents this situation. Part 2...
*December 5, 2012*

**programming**

There are several types of room in a hotel. The HotelRoom Class of Previous Programming Problem was not specific regarding the type of room. Assume that a hotel has guest rooms and meeting rooms. Modify the HotelRoom class as follows: remove the capacity and status instance ...
*November 30, 2012*

**Physics**

A 2.50 kg wheel has a diameter of 20.0 cm and is rotating at 3600 rpm. A force acts on it causing it to come to a rest in 10.0 seconds. What is the magnitude of the force?
*November 26, 2012*

**Chemistry**

No problem :)
*November 24, 2012*

**Chemistry**

For the online course, 1)b and 2)c
*November 24, 2012*

**eng**

is the sentence: "By using a statement that began with 'I,' Ramon was able to state his feelings clearly." a simple sentence or a complex sentence?
*November 20, 2012*

**Physics HELP!**

The position of an object connected to a spring varies with time according to the expression x = (7.1 cm) sin (2.1π t). Find (a) the period of this motion (b) the frequency of the motion (c) the amplitude of the motion (d) the first time after t=0 that the object reaches ...
*November 19, 2012*

**math**

a mystery number is bigger than 50 and larger than 100. you can make exactly five different rectangles with the mystery number of tiles. its prime factorization consists of only one prime number. what is the number
*November 14, 2012*

**math**

a mystery number is bigger than 50 and larger than 100. you can make exactly five different rectangles with the mystery number of tiles. its prime factorization consists of only one prime number. what is the number
*November 14, 2012*

**Physics**

The boom of a crane is 20 m long and is inclined 20ᵒ from the horizontal. A bucket of cement with a mass of 3000 kg is suspended from the upper end of the boom. What is the torque acting on the point where the boom is attached to the crane? A. 5.5 x 105 Nm. B. 3.5 x 105 ...
*November 13, 2012*

**psychometric test**

Hi i have been given an experiment paper on personality, in this we have to come up with an updated version of Eysencks (EPI) questionnaire. This is to measure extroversion only ,we are measuring concurrent validity. Im having difficult in answering the co varibles which is my...
*November 13, 2012*

**Algebra**

help me solve this equation by substitution. y^2− 4x^2 = 7 9y^2+16x^2 = 323
*November 9, 2012*

**chemistry**

ryeng i suppose? this is a very easy question 392.4*10-10= x cm xcm^3= ycm^3 ycm^3* 21.09= mass in grams since face centered unit cell has 4 atoms mass/4, then use the product of that to divide by 1.66*10^-24 = amu your result should be 191.84 amu
*November 8, 2012*

**Chemistry**

How do I change 3,3,4,4,5,5-hexamethyl-1-hexyne into it's molecular formula
*November 8, 2012*

**physics**

the coefficients of static and kinetic friction for stone on wood are, respectively, 0.5 and 0.4. if a 150 kg stone statue is pushed with just enough force to start moving across a wooden floor and the same force continues to act afterward. find the statue’s acceleration.
*November 7, 2012*