# Posts by james

Total # Posts: 2,499

physics
A 75.0-kg man is riding an escalator in a shopping mall. The escalator moves the man at a constant velocity from ground level to the floor above, a vertical height of 4.30 m. What is the work done on the man by (a) the gravitational force and (b) the escalator?

physics
A speed boat is required to move at a constant speed of 50 MPH. What is the power needed to overcome a resistive force of 1000 lbs from the water?

English

Discreet math
[(pvq)^(p=>)^(q=>)]=>r[(pvq)^(p=>)^(q=>)]=>r

Math 61 part 2
Find the centriod of the boundEd by the curvez y=x^2 and y=2x+3

Math 61
Find the arc length of the curve y^3=8x^2 fr0m x=1 to x=8.

statistics
The customer bills in a family restaurant are normally distributed. The bills mean is $28 and has a standard deviation of$6. a. Identify what the random variable you are measuring is in this problem. b. What is the probability that a randomly selected bill will be at least $... World Geography reconciling diverse cultural heritages Geometry 53. What is the equation of the circle with center (2, –5) that passes through the point (–2, 10)? (1 point) (x – 2)2 + (y – (–5))2 = 25 (x – (–2))2 + (y – 10)2 = 241 (x – 2)2 + (y – (–5))2 = 241 (x – (–2))2 + (y... Geometry 50. Find the value of x for ° and °. The figure is not drawn to scale. (1 point) 34° 56.5° 22° 68° Geometry 46. Assume that lines that appear to be tangent are tangent. O is the center of the circle. Find the value of x. Figures are not drawn to scale. mO = 128° (1 point) 52 308 64 256 trigonometry how do i determine the point of intersection of a circle with a radius of 14 and the line coming in at a 35 degree angle physics A juggler traveling in a train on level track throws a ball straight up, relative to the train, with a speed of 5.75 m/s. The train has a velocity of 19 m/s due east. (a) As observed by the juggler, what is the ball's total time of flight? s What is the displacement of the... Physics How much work does it take to stretch a spring with k= 150N/M 10cm from equilibrium? Physics If the coefficient of kinetic friction is 0.25, how much work do you do when you slide a 45 kg box at constant speed across a 5.8m -wide room? Physics Segment A 540-0/120-0 =4.5 Segment B 0-0/0-0 = 0 Segment C 1080-540/288 = 7.5 Physics A snowmobile moves according to the velocity-time graph shown in the drawing. What is the snowmobile's average acceleration during each of the segments A, B, and C? The scale for the time axis is 60 s per increment, and the scale for the velocity axis is 270 m/s per ... CHEMISTRY Which of these statements is not true? lithium reacts with carbon to form ionic carbides, Acetylene is neccesary for the formation of some carbide liquid ammonia is is used to form carbides All metals react with carbon to form carbides Chem The molar weight of MgSO4 is 120.366gmol-1. What is the mass/volume percentage of a 2.5M water solution of MgSO4? Physics Starting from rest, a skier slides 100 m down a 28 degree slope.How much longer does the run take if the coefficient of kinetic friction is 0.17 instead of 0? Statistics During the 2011-12 winter season, a homeowner received four deliveries of heating oil, as shown in the following table: Gallons Purchased Price per Gallon ($) 209 2.60 182 2.40 157 2.78 149 2.74 The homeowner claimed that the mean price he paid for oil during the season was (2...

Statistics
. The following data give the 2010 gross domestic product (in billions of dollars) for al 50 states. The data entered in alphabetical order by state (Source: Bureau of Economic Analysis). 173 49 254 103 1901 258 237 62 748 403 67 55 652 276 143 127 163 219 52 295 379 384 270 ...

Statistics
1. The following data give the amount of money (in dollars) that each of six Canadian social service charities spent to raise $100 in donations during 2010. The values, listed in that order, are for the Calgary Inter-Faith Food Bank Society, Covenant House Toronto, The ... Ethics how do businesses try to find their way around these laws math If it is given tan(A-B) tanA-tanB/-1+tanAtanB and tanP-1/1+tanP=tan195 Find the value of P Math A wheel on Greg's bicycle is 0.3 m in diameter. Greg races the bicycle for 31 m. How many times does the wheel turn as the bicycle travels this distance? Public speaking When conducting research for supporting materials, it is imperative to remember: A. there is one right source for certain information. B. always to take notes and record. C. always do a personal interview. D. use only the most current source of information Environmental Science Consider the population situation in Italy or Germany; very low birth rates, an aging population, and eventual decline in overall numbers. For this week's individual work, please write a 1-2 page paper (counting body text only, not title or reference pages) in double-... calculus Given ensuing information, determine the least cost and the least cost mix of on- and off-shore pipe. The intake facility is in the water 2 miles vertically north of the shoreline The water filtration plant is on land 1 mile vertically south of the shoreline The intake and ... Math 316/1 = x/3 cross multiply 316*3 = x 948 = x x = 948 similar cone volume Ms.Sue Ms.Sue, do you know how to do calc? calculus Given ensuing information, determine the least cost and the least cost mix of on- and off-shore pipe. -The intake facility is in the water 2 miles vertically north of the shoreline -The water filtration plant is on land 1 mile vertically south of the shoreline -The intake and ... Math 32 is wrong 5/(3/5) = (5/1)*(3/5) flip and multiply (5/1)*(5/3) = 25/3 Math dividing fractions is pretty simple. you take the denominator (the second fraction) and flip it. Then simply multiply the fractions ex. (1/2) divided by 5/7 First, flip, then multiply (1/2)*(7/5) so 7*1 = 7 and 5*2 = 10 therefor the answer is 7/10! Physics yea, no thank you! calculus thank you!!! calculus 16. Given the following information, determine the constant speed, travel time, and cost that represent the minimum one-way trip delivery cost. Fuel costs per hour are equal to V^2/600 V is the speed in miles per hour Driver (labor) costs are$10 per hour One-way distance is ...

calculus
16. Given the following information, determine the constant speed, travel time, and cost that represent the minimum one-way trip delivery cost. Fuel costs per hour are equal to V^2/600 V is the speed in miles per hour Driver (labor) costs are $10 per hour One-way distance is ... calc can you tell me how you got √(x^2+4) and √((3-x)^2 + 1) statistics The manufacturer of a new compact car claims the miles per gallon (mpg) for the gasoline consumption is mound-shaped and symmetric with a mean of 24.6 mpg and a standard deviation of 11.2 mpg. If 30 such cars are tested, what is the probability the average mpg achieved by ... maths The monthly standing charge for a electrical company is €12.50 plus a cost of €0.16 per unit of electricity used. A customers monthly bill was €156.18. Determine how many units of electricity the customer used in that month. physics It is 5.4 m/s Science 1.Why do you think an FRH doesn’t come with water already in it? 2.Do you think there are small pieces or large pieces of magnesium metal in an FRH? Explain. 3. Why is it important that the reaction in an FRH be fast? Chemistry What should be the number of significant figures in the following calculation? It's an error calculation which is absolute value (True value - experimental value) / true value * 100 so it would be: absolute value [-601.7 - (-587)] / -601.7 * 100 Should the answer be 2.44 ... MATHS In a bookcase, there are 7 fiction books for every 4 nonfiction books. There are 33 books in the bookcase. How many nonfiction books are in the bookcase? English ok thank you - so it is C... English Forget it - it's C...right? English 8. Identify the sentence that contains an error in punctuation or capitalization. "After you’ve rested," Frank said, "please help me move these boxes." "Can we wait until later?" asked Emily. "I have a lot of homework." "It won... English thank you English Mel Gibson , Hamlet and Macbeth in A...bonjour in B.,...Smithsonian and Time in C...and Our Town in D.. English After reading your link. i think it is B. with bonjour being italicized. English What do you think it is? why would MEL GIBSON be italicized? In that sentence Mel gibso is italicized and hamlet or macbeth is italicized. English 7. Identify the sentence that contains a word or phrase that should not be in italics. *Is Mel Gibson in the movie version of Hamlet or Macbeth? Lenny has trouble pronouncing the word bonjour. Glenda subscribes to Smithsonian and Time magazines. Thornton Wilder's play Our... english after Bites english I understand what you are saying now - I think it is B.. english I have to pick the one that is pucuated or capitalized incorrectly. and i CANNOT pick two answers. english I understand that. I think it is A. english so which one would you go with? english 9. Identify the sentence that contains an error in punctuation or capitalization. Perry asked if anyone knew the words to "Locked Out." "Wasn't that in the movie Reality Bites," asked Grace? Garrison yelled from the other room, "I loved that movie... english I think you've is incorrect. english now that I have reread them, I think its A. english why is that wrong? shouldn't it be in quotations. english 8. Identify the sentence that contains an error in punctuation or capitalization. "After you’ve rested," Frank said, "please help me move these boxes." "Can we wait until later?" asked Emily. "I have a lot of homework." "It ... english Thank you english he wrote it about himself. that is an autobiography. english why not the third one? english 11. All of the guests at the party partook in libations of all sorts to honor the hostess of the party. a meal of several courses *the pouring of drink as an act of respect the sharing of kind words when in a large group a form of gift giving that pays respect to a friend 12... History Thank You. History 1. A decline in the number of U.S. manufacturing jobs was in part the result of *globalization. biotechnology. entrepreneurs. superstations. 2. The first modern computer was designed to benefit universities. the economy. *the military. corporations. 3. Which company developed... College algebra 20x^2+12x Statistics -1.2816 physics Kelli weighs 392 N, and she is sitting on on a playground swing that hangs 0.4 m above the ground. Her mom pulls the swing back and releases it when the seat is 1.1 m above the ground. If Kelli moves through the lowest point at 1.5 m/s, how much work was done on the swing by ... physics Kelli weighs 392 N, and she is sitting on on a playground swing that hangs 0.4 m above the ground. Her mom pulls the swing back and releases it when the seat is 1.1 m above the ground. If Kelli moves through the lowest point at 1.5 m/s, how much work was done on the swing by ... accounting B 100000 History 4. What Reagan policy resulted in an increase in the federal budget deficit? *supply-side economics deregulation increased defense spending increased spending on social programs Thank You. 3rd grade math What does 5 fracture each 1/2 mean? History Thanks. i figured it out. its high inflation. History 4. Which of the following influenced the presidential election of 1980? high inflation low gas prices racial tensions *a war with Iraq Thank You. physics An 11-mm wide diffraction grating has rulings of 550 lines per mm. Light is incident normally on the grating. The longest wavelength that forms an intensity maximum in the fifth order is closest to? The correct answer is 488nm but I cant seem to get that answer. physics An 11-mm wide diffraction grating has rulings of 550 lines per mm. Light is incident normally on the grating. The longest wavelength that forms an intensity maximum in the fifth order is closest to? The correct answer is 488nm but I cant seem to get that answer. Math- steve or ms. sue does the data in the table represent a direct variation or an inverse variation? x 2 4 8 12 y 4 2 1 2/3 Choices: inverse variation; xy = 8 direct variation; y = 8x inverse variation;y/x = 8 *direct variation; y = 8/x Thank You. Clinical Chemistry DrBob??? Clinical Chemistry Anyone here good with clinical chemistry, particularly separation assays and high performance liquid chromatography? College Algebra Ahh I can't believe I didn't see that! I appreciate your help! College Algebra Theres this chemistry problem im getting stuck in because i'm confusing myself with the math. Equation given = %O2 saturation = 100 x (pO2/(pO2 + K) %O2 = 35 K = 1.51 how do I calculate pO2?? I can't seem to cancel them out correctly. Answer = 0.813 calculus Determine the maximum and minimum of each function on the given interval. a)  = 2x^3 − 9x^2 ,−2 ≤ x ≤ 4 b)  = 12x − x^3 ,  x∈ [−3,5] Grade 12 Calculus Determine the absolute extrema of each function on the given interval. Illustrate your results by sketching the graph of each function. a) f(x) = x^2 − 4x + 3 , 0 ≤ x ≤ 3 b) f(x) = (x − 1)^2&#... MATH Find all solutions of the equation tan^5 x - 9tan x =0. The answer is Ak\pi where k is any integer, the constant A=??? math 4 * 15.00=$60

pre calculus
Simplify and write the trigonometric expression in terms of sine and cosine: ((2+tan^2 x)/(sec^2 x))-1 = (f(x))^2 f(x)= ??

Find all solutions of the equation tan^5 x - 9tan x =0. The answer is Ak\pi where k is any integer, the constant A=???

pre calc
Find all solutions of the equation 3sin^2 x -7sin x +2 = 0 in the interval [0,2pi). The answer is x_1= ?? and x_2= ?? with x_1<x_2.

pre calculus
Simplify and write the trigonometric expression in terms of sine and cosine: sin x + (cot x cos x) = 1/(f(x) f(x)= ???

math
Find all solutions of the equation tan^5 x - 9tan x =0. The answer is Ak\pi where k is any integer, the constant A=???

Math
2 divide 69.28 plz give work too!

PHILOSOPHY
Who claimed that our subjection to pain and pleasure should be the foundation for our lives?

Math
kkk thanks? i don't see how to do it tohugh.................................. though* ...........................................

foundations of algebra
if 950 watts gives a 164 mile radius, how much power is needed to get a 150,000 square mile area?

Geography
Why did East Pakistan feel discriminated against by west Pakistan