Saturday
December 20, 2014

Posts by Blake


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
2/3
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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