Saturday

December 20, 2014

December 20, 2014

Total # Posts: 219

**trig**

Any chance you could show a bit of work? Thanks.
*April 27, 2011*

**trig**

PIa = pi*a PI/2 = pi/2
*April 27, 2011*

**trig**

A coil of wire rotating in a magnetic field induces a coltage E=20sin((PIa/4) - (PI/2)). Use an identity to express this in terms of cos(PIa/4). Types of Identities: Double Angle, Half Angle, Sum and Difference of Sine, Cosine, and Tangent, Pythagorean, Reciprocal, Quotient. ...
*April 27, 2011*

**PHYSICS PLEASE HELP**

240 = v/2L 240*(2*.640) = 307 ... 1st harmonic wavelength = 1.28 so, First Question: v = 307m/s & wavelength = 1.28 frequency of 3rd harmonic = 3*f = 720 n = # of harmonic so 3*f = 3rd harmonic 720=n(v/(2L)) so n/(2L) = wavelength 3/(2*.640) = 2.34 m Second Question: 2.34m 3(...
*March 31, 2011*

**math**

Sophina bought 3 yards of trim to put around a rectangular scarf. She does not want the scarf to be wider than 12 inches or narrower than 6 inches. Using whole numbers, if she uses all the trim, what are the possible dimensions of her scarf in inches?
*March 30, 2011*

**math**

Mrs Nelson has a rectangular flower box that is 5 feet long and 2 feet tall. She wants the width of the box to be no more than 5 feet. If the width is a whole number, what are the possible volumes for the flower box?
*March 30, 2011*

**math**

Jeff put a small box that is 12 inches long, 8 inches wide, and 4 inches tall inside a box that is 20 inches long, 15 inches wide, and 9 inches high. How much space is left in the larger box?
*March 30, 2011*

**math**

Raymond has exactly 360 square inches of cardboard to make a box. He wants two of the dimensions to be 6 inches and the other one to be a whole number of inches. How many different size boxes can he make?
*March 30, 2011*

**Algebra 1**

What is the answer to 6t^+2-4t-3t+2? And please explain the steps of how to solve this. The directions say to factor each polynomial.
*March 6, 2011*

**Physics**

In Figure 4-44, a baseball is hit at a height h = 1.10 m and then caught at the same height. It travels alongside a wall, moving up past the top of the wall 1.1 s after it is hit and then down past the top of the wall 4.8 s later, at distance D = 47 m farther along the wall. (...
*January 21, 2011*

**social studies**

Why do you thnk the distance between europe and the u.s affected american attitudes toward the war?
*January 20, 2011*

**Chemistry**

using the balanced reaction equation for the combustion of propane, determine the number ofmoles of oxygen that would react with.50 mol propane and the number of moles of carbon dioxide that would be produced?
*January 9, 2011*

**physics**

the same force is applied to each object which distance will travel thegreatest distance... a.bicycle b.car c. truck d. bus
*January 6, 2011*

**Math**

5^1=5 5^2=25 5^3=125 using patterns determine the last 3 digits of 5^100
*December 16, 2010*

**Physics**

A long wire that carries a current is bent into a solenoid with upward current in the front looking. If the observer could "see" the magnetic field inside this arrangement of solenoid from the right side, how would it appear? a) The observer would "see" a ...
*November 14, 2010*

**science**

3. The membranous coverings that protect the b B. meninges. D. gyri. 4. A common result of hyperthyroidism is A. acromegaly. C. Graves’ disease. B. osteoporosis. D. myxedema. 5. A 63-year-old man has become progressively hard of hearing. He’s a retired airplane ...
*November 12, 2010*

**physics 111**

The 20-g centrifuge at NASA's Ames Research Center in Mountain View, California, is a cylindrical tube 58 ft long with a radius of 29 ft (see figure). If a rider sits in a chair at the end of one arm facing the center, how many revolutions per minute would be required to ...
*November 7, 2010*

**english**

with puppy dog eyes
*October 31, 2010*

**physics 111**

A ball of mass 0.120 kg is dropped from rest from a height of 1.25 m. It rebounds from the floor to reach a height of 0.600 m. What impulse was given to the ball by the floor? answer in kg·m/s
*October 27, 2010*

**physics 111**

A block of mass 2.50 kg is pushed 2.80 m along a frictionless horizontal table by a constant 10.0 N force directed 25.0° below the horizontal. 1) what's the work done by the applied force? in joules 2)whats the work done by the normal force exerted by the table? in ...
*October 15, 2010*

**phy 111**

A daredevil on a motorcycle leaves the end of a ramp with a speed of 34.5 m/s as in the figure below. If his speed is 32.1 m/s when he reaches the peak of the path, what is the maximum height that he reaches? Ignore friction and air resistance.
*October 14, 2010*

**calculus reposted**

Given the graph of f(x) find the graph of 2 f( -3x - 2) - 4 Is this correct??? First, compress the graph horizontally by 3. Second, reflect the graph over the y-axis. Third, shift the graph 2 units to the right. Fourth, stretch the graph vertically by 2. Lastly, shift the ...
*October 14, 2010*

**Physics 111**

thank you so much drwls
*October 14, 2010*

**Physics 111**

While running, a person dissipates about 0.60 J of mechanical energy per step per kilogram of body mass. If a 62 kg person develops a power of 67 W during a race, how fast is the person running? (Assume a running step is 1.5 m long.)
*October 14, 2010*

**calculus**

Given the graph of f(x) find the graph of 2 f( -3x - 2) - 4 Is this correct??? First, compress the graph horizontally by 3. Second, reflect the graph over the y-axis. Third, shift the graph 2 units to the right. Fourth, stretch the graph vertically by 2. Lastly, shift the ...
*October 13, 2010*

**Calc. Repost- Please Help**

I'm confused. Why do you use f(x)= 1-x, g(x)=-x... I don't see that interval, but I see that interval 2 is the 2nd line for g(x). ???
*October 13, 2010*

**Calculus**

How do I solve for lim h->0 (((a+h)^2 + 1)/(3(a+h)+7) - ((a^2 + 1)/3a + 7)) and then all divided by h? The question was use the limit definition to find the derivative of f(x)= (x^2 + 1)/(3x + 7). I tried solving what I did above, but had no luck. I used wolfram alpha to ...
*October 12, 2010*

**calculus**

find functions f(x) and g(x) so that f(g(x))= sqrt(tan(3x^2 - 7)) Would this work??? g(x)= 3x^2 -7 f(x)= sqrt(tan(x))
*October 12, 2010*

**geometry**

(6,4)and(6,-2) find the distance between these pairs of points
*September 22, 2010*

**math**

what is the pattern for the following numbers 8 17 35 71 7143
*September 15, 2010*

**Science**

How does a cell gets its nutrients?
*August 21, 2010*

**Calculus 1**

Find the equlibrium point for each pair demand and supply function. Demand:q = 8800-30x; supply:q = 7000+ 15x
*July 22, 2010*

**Algebra**

for the follwong equation, state the value of the discriminant and then describe the nature of the solutions: 5^2+9x+2=0
*June 10, 2010*

**Algebra**

Thanks...
*June 9, 2010*

**Algebra**

Multiply: (-3t)^2(2t^6)^3
*June 9, 2010*

**Algebra**

Solve by completing the square: x^2 + 7/2x =7 (7/2x is a fraction)
*June 3, 2010*

**algebra**

find all numbers for which the rational expression is undefined 8/x-4
*May 5, 2010*

**Math**

so with 4/8 and 7/8is 7/8 greater or less than 4/8 and why?
*April 30, 2010*

**Math**

How do you know which one is the greatest? and why please? 7/8 or 1/2
*April 30, 2010*

**Math**

here are some fractions : 3/9, 8/9, 7/9, 4/9, 2/9, 5/9, 6/9 If I were to put them in the order of the greatest, what order does that mean and how did you work that out?
*April 30, 2010*

**math**

log 625 3/4 = x
*April 4, 2010*

**math**

log 32 x = 6/10
*April 4, 2010*

**math**

the graph shows a circle with a radius 1 inscribed in the parabola y=x^2. Find the center of the circle.
*March 31, 2010*

**Math**

Francesca has 16/7 ft of string for her kite. Jason has 2 3/4 ft of string for his kite. Katie has more string than either Francesca or Jason. How much string could Katie Have?
*March 17, 2010*

**Chemistry**

What is the pH of a solution containing 0.10 M propanoic acid (HC3H5O2) and 0.10 M sodium propanoate after 0.02 mol of HCl is added to 1.0 L of the solution?
*February 28, 2010*

**Chemistry**

This could be a dumb question but how do you find Kb here in order to solve for x?
*February 22, 2010*

**Chemistry --really need help!**

I was also wondering about this question. So once you get those moles all you should have to do is find the concentration by dividing by 25 L? Then plug it into the equation for Kc? I keep getting 320, which isnt right. Kc= (2*.2*.05/25L)^2/(.2*.95/25L)(.2-3*.2*.05/25L)^3 That...
*February 19, 2010*

**algebra**

Thank you Ms. Sue x=116.03
*January 26, 2010*

**algebra**

Tod paid $81.22 for a pair of shoes during a 30% off sale. What was the original price of the shoes?
*January 26, 2010*

**algebra**

Two angles are complementary. The sum of the measure of the first angle and half the second angle is 68 degrees. Find the measures of the angles: What is the measure of the smaller angle? What is the measure of the other angle?
*January 21, 2010*

**algebra**

Ok, great thanks for the help both of you!
*January 20, 2010*

**algebra**

So I got x>2 for the first one and x>4 for the second one, now how does that fit into {xIx> ? } Shouldn't it be just one number?
*January 20, 2010*

**algebra**

4x+12>4 and 3x-25>-13 Solution {xIx> ? } I get so lost on these.
*January 20, 2010*

**Chemistry**

A chemist reacts 8.85 g of iron with an excess of hydrogen chloride to form hydrogen gas and iron choloride. How do you calcualte the theoretical yield and the percentage yield of hydrogen if .27g H2 are collected.
*January 10, 2010*

**algebra**

Ok I think I have it: F(t)=750-25t
*January 6, 2010*

**algebra**

Bob bought a fax machine for $750. The fax depreciates at the rate of $25 a month. Find a function "F" that can be determine the value of the fax machine t months after the purchase. Complete the model: F(t)=
*January 6, 2010*

**social studies**

a study of the case of the american revolution of 1776 the french revolution of 1789 and the russian revolutioj of 1917 best supports the generalization that revolution is most likely to occur when?
*December 22, 2009*

**algebra**

Thanks for the help!
*December 7, 2009*

**algebra**

solve for v v=-1/3t + 4 with t=6
*December 7, 2009*

**us history**

a study of the case of the american revolution of the 1776 the french revolution of 1789 and the russian revolution of the 1917 best supports the generalization the revolution is most lilely to occur when?
*November 15, 2009*

**MATH**

add 4 to both sides. 2x+4=y-4+4 2x+4=y is the final answer if you're solving for y
*November 10, 2009*

**Pre Algebra**

try drawing a graph. in the definition of a function, an x value can only have one y value. since the x value of four has two y values (5 and 9), it can't be a function. try going to wikipedia and searching for "function mathematics" if you're still having ...
*November 10, 2009*

**Pre Algebra**

No. the points (4,5) and (4,9) have two different y-values for the given x-value (4). this fails the vertical line test.
*November 10, 2009*

**precalculus**

1.csc^2x-1/csc^2x=cos^2x 2.1/1-cosx+1/1+cosx=2csc^2x 3.sinxcosy+cosxsiny/cosxcosy-sinxsiny=tanx+tany/1-tanxtany
*November 10, 2009*

**physics**

a highway is to be built between two towns, one of which lies 35.0 km south and 72.0 km west of the other. what is the shortest length of highway that can be built between the two towns, and at what angle would this highway be with respect due to west? can some one solve this ...
*October 16, 2009*

**Social Studies**

What factors were responsible for the growing wealth and prosperity of England in the 17th century This is a question from Crossroads Socials 9 Please help.
*October 12, 2009*

**math**

In the “long run,” what is the expected profit, or loss, per game if you pay $2 to play a game and receive $10 if you throw a “doubles” on a single throw of a pair of dice?
*September 29, 2009*

**Math**

A raffle sold 400 tickets and awards a grand prize of $1,000. Was $4 a fair price to pay for a ticket?
*September 28, 2009*

**Math**

The mean height of 5 students is 58.8 in. If a new student is added the mean height becomes 60 in. What is the height of the new student?
*September 27, 2009*

**math**

Thank you!
*September 22, 2009*

**math**

Suppose that an experiment has five separate mutually exclusive outcomes: A, B, C, D, and E. If the sample space for the experiment is a uniform sample space, what is P (A, B or E)?
*September 22, 2009*

**social studies**

who was the conquistador who conquered the aztecs
*September 22, 2009*

**pre-algebra**

determine which numbers in each set are solutions to the corresponding equations. 3n=45; {15, 30, 45}
*September 21, 2009*

**math**

Is there an easy way to tell what graph I should use for questions like this? The following is a list of product manufacturing levels for the 50 states in 2004 ($ millions): 76, 5, 42, 55, 388, 34, 45, 17, 84, 131, 5, 17, 210, 184, 79, 56, 97, 124, 14, 36, 77, 220, 88, 44, 103...
*September 18, 2009*

**Math**

Help, I am stuck: Find (A �� B) �� C, given A = {s, e, t}, B = {m, e}, and C = {f, r, e, e}. A) { } B) {s, e, t, m, f, r} C) {e} D) {s, e, t, m, e, f, r, e, e}
*September 11, 2009*

**Math**

Cool! Thank's for the help!!!
*September 5, 2009*

**Math**

Mr. Rivera opened a package of 150 drinking cups for his restaurant. During the day, 97 cups were used. What fraction of the package of cups was used? Express the result using a simple, convenient fraction that is close in value to the exact answer. A) 2/3 B) 3/5 C) 1/2 D) 3/4
*September 5, 2009*

**economics**

is this a service, greeting or merchandise approach You work as a sales associate in a camera store. you observe a woman looking at a digital camera. wouldn't that be service?
*March 31, 2009*

**s.s.**

what does responding to consumers mean?
*March 3, 2009*

**s.s.**

what are local businesses
*March 3, 2009*

**social studies**

what are examples of local businesses
*March 3, 2009*

**ms. sue!**

yes but i need it for employment and standard of living too.
*February 18, 2009*

**ms. sue!**

what impact does outsourcing have on a countrys economy and on business?
*February 18, 2009*

**gov**

those were for different things.. i need help with employment and standard of living now
*February 18, 2009*

**gov**

what does outsourcing on a countrys economy and on a business? how does it affect consumer prices, direct foreign investments, and business operations and profits
*February 18, 2009*

**government**

what impact foes outsourcing on a countrys economy and on a business? how does it affect consumer prices, direct foreign investments, and business operations and profits
*February 18, 2009*

**government**

what is the government currently doing to help our economy? what implications foes the proposed economic stimulas package have on people of this country. US
*February 13, 2009*

**science**

what is an atomic bomb made of?
*February 5, 2009*

**economics**

what are the three phases of the marketing process a) directing, controlling, and evaluating, b) planning, implementation, and controll c) segmenting a market, targeting a group, and promoting a product d) analyzing, peforming, and evaluting my guess is c. but not sure
*February 4, 2009*

**applied information technology**

What is a Pentium 3 computer? when were they first released? Try to find a typical specification for a Pentium 3 computer
*February 3, 2009*

**math**

Linda invests $15,000 in a retirement account that pays 9%interest compounded monthly. How much will she have in this account after 5 years?
*December 13, 2008*

**Math**

Pete is watching his ant farm one afternoon and observes that two ants walk away from each other at a 90 degree angle. After a few seconds, the first ant has traveled 3 inches and the second ant has traveled 4 inches. How far apart are the two ants at that point?
*December 13, 2008*

**algebra**

Find x correct to 4 decimal places so that (3.4)^(2x-1)=5
*December 13, 2008*

**Physics- 8th Grade**

What force is needed to accelerate a 10 kilogram shopping cart 3 m/s^2 (squared)?
*October 30, 2008*

**Math**

thanks.
*October 20, 2008*

**Math**

How do you solve for inequalities like this? 1< 4-x < 1.59
*October 20, 2008*

**math**

Find the value of the following fractional expression: 10/1 + 9/2 – 8/3 – 7/4 – 6/5 – 5/6 – 4/7 – 3/8 – 2/9 – 1/10 Provide your answer as a simplified fraction.
*October 8, 2008*

**Finance**

What is the relatiomship between the required risk premium on a portfolio and the price at which the portfolio will sell? Like as the required premium increases, will the price be higher or lower?
*September 30, 2008*

**Finance**

Consider a risky portfolio. The end-of-year cash flow derived from the portfolio will be either $70,000 or $200,000 with equal probabilities of 0.5. The alternative risk-free investment in T-bills pays 6 percent per year. a) If you require a risk premium of 12 percent, how ...
*September 30, 2008*

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