Saturday
August 27, 2016

Posts by tim

Total # Posts: 1,361

Business Statistics
The quality control manager at a light bulb factory needs to estimate the mean life of a large shipment of light bulbs. The manufacturer's specifications are that the standard deviations is 100 hours. A random sample of 64 light bulbs indicated a sample mean life of 350 ...
September 20, 2015

Math
1.MO bisects LMN, m LMN=6x-28, m LMO=x+34. Find m NMO. A) 46.4 B) 92.8 C) 63 D) 58 Is the answer A?
September 18, 2015

Math
1. Name the intersection of plane ACG and plane BCG. A. AC B. BG C. CG D. The planes need not intersect. Is the answer C? this is hard for me since there isn't a picture. Thank you!
September 18, 2015

Math
1. _____ Two points are collinear. A. Any B. No C. Sometimes Is the answer A?
September 18, 2015

Math
1. Two angles whose sides are opposite rays are called _____ angles. Two coplanar angles with a common side, a common vertex, and no common interior points are called ____ angles. A. Adjacent; vertical B. adjacent; complementary C. vertical; adjacent D. vertical; supplementary...
September 18, 2015

science
When a 2.00 g sample of Al2(SO4)3·xH2O is heated to remove all water, a mass of 1.03 g remains. Determine the value of x.
September 17, 2015

algebra
if i knew do you think i would be asking for help
September 16, 2015

algebra
201.1428571 round two decimal places
September 16, 2015

college algebra
i do not understand the mean and it's suppose to be rounded to two decimal places
September 16, 2015

college algebra
mean = (round to two decimals places)
September 16, 2015

college algebra
195, 176, 215, 200, 189, 232, 201 mean= median= mode= 25% percentile= 75% percentile= maximum= minimum= range=
September 16, 2015

college algebra
Country CO2 Emissions (tons of carbon dioxide) 2012 population  Emissions per Capita  China 8,782,000,000 1,359,750,000    United States 5,144,000,000 316,597,000   India 2,185,000,000 1,233,460,000  Russia &#...
September 16, 2015

college algebra
In Japan, there were 94,848 deaths attributed to heart disease and the population of Japan is about 128 million. If the United States were able to reduce its number of deaths to be proportional to that of Japan, about how many deaths due to heart disease would be expected? (...
September 16, 2015

college algebra
Are total emissions or per-capita emissions a better gauge when comparing the CO2 emissions of various countries? Why?
September 16, 2015

college algebra
In Japan, there were 94,848 deaths attributed to heart disease and the population of Japan is about 128 million. If the United States were able to reduce its number of deaths to be proportional to that of Japan, about how many deaths due to heart disease would be expected? (...
September 16, 2015

college algebra
According to the CDC there were 597,689 deaths in the US in 2010 attributed to heart disease. Given that the US population in 2010 was close to 308 million, what was the death rate per capita for heart disease in the US for 2010? (round to five decimal places)
September 16, 2015

college algebra
In the state of Indiana, 192,031 people claim not to speak English very well. If this is 3.2% of the population of Indiana residents aged 5 years and older, estimate the population of Indiana residents aged 5 years and older. (round to the nearest person)
September 15, 2015

college algebre
There are approximately 314 million people in the U.S. If the world population is 7.1 billion people, what percent of the world population is in the U.S.? (round to one decimal place)
September 15, 2015

Science
1. What is the difference between a scientific theory and a scientific law? A) A scientific theory describes a pattern of observations, while a scientific law is an educated guess based on observation. B) A scientific theory is based on a few experiments, while a scientific ...
September 14, 2015

Science
A scientist studying the effects of gamma rays on marigolds gathered the data shown below. Hypothesis: Marigolds exposed to higher levels of radiation will not grow as well as marigolds that are exposed to less radiation Plant A: Gamma Rays (Rad/day) is 5. Water (mL/week) 50. ...
September 14, 2015

Business connections
Are there any choices?
September 14, 2015

Math
1. What is the name of the ray that is opposite of ray BA? Description of the ray. It's a straight line with the points A B C D all in a row. A) Ray BD B) Ray BA C) Ray CA D) Ray DA This doesn't make sense. I thought that CD would be opposite of BA. But I've done ...
September 14, 2015

Math
1. Plane hkp and plane rkp are two distinct planes. name the intersection of the plane hkp and plane rkp. A) Ray KP B) Ray HK C) Ray RP D) The planes need not intersect. Is the answer A? Please correct me if I am wrong. Thank you!
September 14, 2015

Algebra
The total of dharma's, Eugene, and Ferns final exam score is 272 Dharma score is added to Eugene score the sum is 28 points less than twice ferns score if Eugene score is eight point higher than Dharma score what is each student's final an exam score?
September 12, 2015

MATH (factoring)
I don't understand how to factor this question: (x+y)^2 -64 The final answer is (x + y + 8) (x + y - 8). I just don't understand how to get to that answer.
September 10, 2015

Physics
An ideal gas starts in state A at temperature T. The gas expands to new volume V by an adiabatic process and its final temperature is T′. What is the relationship between T and T′? A) T < T′ B) T > T′ C) T = T′ D) The answer depends on the ...
September 9, 2015

Social Studies
1)How did the people of the inca empire adapt to their surrounding physical environment A) By building longhouses and canoes out of bent trees and bark. B) by cutting terraces along steep slopes so they could plant crops. C)By pulling rich soil from the bottom of the large ...
September 9, 2015

Social Studies
Yeah, I agree! So I think the answer would be A.
September 9, 2015

Social Studies
1)How did the shift to farming impact native american cultures? A) Farming impact native cultures to build more permanent shelters out of brick, clay, stone, and wood. B) Agriculture led to a new way of life for native peoples, encouraging the development of distinct customs ...
September 9, 2015

Math
I tested out the theories A and B. None of them worked. So what does is mean by the x-axis and the y-axis? What does that mean?
August 31, 2015

Math
1. a triangle has vertices at (0,0), (2,1),(1,3). About which line could the triangle be resolved, in order to form one cone? A) the line at x=2y B) the line at y=3x C) the x-axis D) the y-axis Could someone please explain how to do this? Thank you.
August 31, 2015

Math
Oh yeah! I'm so sorry I got 300 but somehow came up with 3 quarts. Sorry about that.
August 31, 2015

Math
Oh ok! So about 3. There's gonna be a little extra but if rounded it would be 3.
August 31, 2015

Math
I'm still confused...
August 31, 2015

Math
1. Nicole plans to apply 2 coats of varnish to a square floor measuring 12 feet on each side. if 1 quart of varnish covers 150 square feet, what is the minimum number of quarts of varnish nicole needs for 2 coats of varnish? A) 1 B) 2 C) 3 D) 4 So this question is really ...
August 31, 2015

Math
1. In geometry, the symbol used to identify an object often looks like the meaning, or picture, of itself. Which of the symbols in geometry listed below does not resemble itself? A) angle B) parallel C) perpendicular D) similar** Is the answer D? Thank you for any help. :)
August 31, 2015

Math
One half the members of the junior high math team are ninth graders. One fourth of the remaining members are eighth graders. One fifth of the rest are seventh graders. There are twelve 6th graders on the team. How many members on the team?
July 13, 2015

english
research skills are fundamental to a. academic writing b. all types of writing c. education, literature, business, and other industries, d. libraries it could be a,b, or c, but i chose b. pleases help
June 2, 2015

english
Blooms taxonomy was developed as a (n) a. research methodology b. problem solving strategy c. evaluation of critical thinking skills d. concept mapping tool. I did the reseasch on this an I'm torn between b. and c. I feel more strongly with c. evaluation of critical ...
June 1, 2015

english
all are good but i say a
May 30, 2015

english
poor reading comprehension skills lead to a. failure to remember what was read b. failure in academic performance c. lack of interest and concentration d. inability to relate sentences
May 30, 2015

homework
poor reading comprehensive skills lead to a. failure to remember what was read b. failure in academic performance c. lack of interest and concentration d. inability to relate sentences to one another. all are right to me but i will say B
May 30, 2015

statistic
5. Decide whether the following experiment is a binomial experiment. Explain your answer. A researcher observes the gender of the next 100 babies born at a local hospital. The boys and girls are equally likely. The random variable represents the number of boys.
May 20, 2015

Math
Whitney invested $25,000, part at 19% and part at 6%. If the total interest at the end of the year is $3,320, how much did she invest at 19% ?
May 13, 2015

Trigonometry
Use the trigonometric subtraction formula for sine to verify this identity: sin((π / 2) – x) = cos x
May 10, 2015

Trigonometry
Can you show steps on deriving the identity from the sum and difference formulas for cosine: sin a sin b = (1 / 2)[cos(a – b) – cos(a + b)]
May 10, 2015

ap chemistry
going left
May 9, 2015

phi 208
kants just war theory
May 9, 2015

Math
Find the level of elevation of the sun when a 842 foot building casts a shadow72.6 feet long
May 6, 2015

college precalculus
Saving. How much money should be invested monthly at 6% per year, compounded monthly, in order to have $2000 in 8 months?
May 5, 2015

Math
Find the volume of a regular square pyramid that is 8 m high and has the length of the side of the base as 9 m
April 29, 2015

Math
The lens of a telescope has a diameter of 24 inches. Find the exact area of the lens.
April 29, 2015

chemistry
Did I round to the correct number of Sig figs? 18.0/83 x 100= 22% 15.87/149.87x 100= 11.3%
April 16, 2015

Chemistry
What is the maximum mass of H2O that can be produced by combining 71.7 g of each reactant? 4NH3 (g) + 5O2 (g) -----> 4NO (g) + 6H2O (g) ___________ g H2O ?
April 14, 2015

Chemistry
What is the maximum mass of S8 that can be produced by combining 85.0 g of each reactant? 8SO2 + 16H2S yields 3S8 +16H2O
April 14, 2015

Chemistry: Acids/Bases
When a 100 mM aq solution of sodium acetate was prepared in the lab it had a pH of 8.9. Calculate the amount of acetic acid (in g) to be added to 0.5 L of this sodium acetate solution in order to bring its pH to the target value of 5.00.
April 11, 2015

chemistry
I understand part (I) but We have only briefly gone over the HH equation in class and I understand how to use it to get the pH but I really don't understand how to use it in part (II), assuming I should be using it in this question? (I)Calculate the pH of an acetate buffer...
April 10, 2015

Math
Use logarithmic differentiation to find the derivative of y: y=x^(e^x)
March 30, 2015

math
if I bought 3 items at 24.95 and 2 items at 45 and they were all 30% off, If I had bought these 5 items without the 30$ off what would I have paid
March 20, 2015

economics
Samantha Roberts has a job as a pharmacist earning $30,000 per year, and she is deciding whether to take another job as the manager of another pharmacy for $40,000 per year or to purchase a pharmacy that generates a revenue of $200,000 per year. To purchase the pharmacy, ...
March 20, 2015

economics
Samantha Roberts has a job as a pharmacist earning $30,000 per year, and she is deciding whether to take another job as the manager of another pharmacy for $40,000 per year or to purchase a pharmacy that generates a revenue of $200,000 per year. To purchase the pharmacy, ...
March 20, 2015

algebra
Is the answer 10 w + 3w = 13w 11-8 = 3 13w -3?
March 18, 2015

algebra
10w + 11 - 3w -8
March 18, 2015

social problems
patriarchy
February 12, 2015

math
A farmer wants to fence a small rectangular yard next to a barn. Fence for side parallel to the barn will cost 75 per foot and the fence for the other two sides will cost 30 per foot. The farmer has a total of 1750 dollars to spend on the project. Find the dimensions for the ...
February 12, 2015

Physics
a BALL IS THROWN UPWARD WITH AN INITIAL VELOCITY OF 9.8 M/S FROM THE TOP OF A BUILDING. FILL A TABLE BELOW SHOWING THE BALLS POSITION,VELOCITY, and ACCELERATION AT THE END OF EACH OF THE 1ST 4SEC OF MOTION TIME(s) POSITION(M) VELOCITY(M/S) 1 2 3 4 Acceleration (M?S^2) Fill in ...
February 11, 2015

Physics
During a rElay race along a straight ROAD the 1st runner on a three person team runs D1 with a constant velocity v1. The runner then hands off the baton to the sEcond runner who runs d2 with a constant vElocity v2. The batton is then passed to the 3rd runner who completes the ...
February 11, 2015

Physics
For a science fair competition, a group of High School students built a kicker-machine that can launch a golf ball from the origin with a velocity of 12.9 m/s and initial angle of 31.7° with respect to the horizontal. a) Where will the golf ball fall back to the ground? ...
January 27, 2015

language arts
No, it is still CBC.
January 6, 2015

World history
i dont understand what you mean
January 2, 2015

World history
I need help on a artistic response to the contemporary world im not creative i need help please im thinking to do one on war or violence
January 2, 2015

Just out of curiosity
So I believe you're American. Am I right?
December 14, 2014

Just out of curiosity
Oh that's nice of you guys! (: So who is the founder of this site? Are tutors here American?
December 14, 2014

Just out of curiosity
Are the teachers here getting paid to help the students? Is this a paid program?
December 14, 2014

Chemistry
1) A 0.1375-g sample of solid magnesium is burned in a constant-volume bomb calorimeter that has a heat capacity of 3024 J/C. The temperature increases by 1.126 degrees C. Calculate the heat given off by the burning Mg, in kJ/g and kJ/mol. 2) Determine the amount of heat in kJ...
November 18, 2014

Chemistry
1) Determine the amount of heat in kJ given off when 1.26 x 10^4 g of NO2 are produced according to the equation: 2NO (g) + O2 (g) --> 2NO2 (g) and delta (H) = 483.6 kJ/mol 2) A sheet of gold weighing 10 g and at a temperature of 18 degrees C is placed on a flat sheet of ...
November 18, 2014

physics
What is the kinetic energy in MeV of a π–meson that lives 1.80×10-16 s as measured in the laboratory, and 0.840×10-16 s when at rest relative to an observer, given that its rest energy is 135 MeV?
November 16, 2014

Maths
4. Tonya is 1.3 meters tall. She stands 7 meters in front of a tree and casts a shadow 1.8 meters long. How tall is the tree?
November 12, 2014

math
a box of chalk and 2 staplers costs $10. 3 boxes of chalk and 2 staplers costs $18. find total cost of 1 box of chalk and 1 stapler
October 30, 2014

precalculus
one section of a suspension bridge has its weight uniformly distributed between twin towers that are 400 feet apart and rise 90 feet above the horizontal roadway. a cable strung between the tops of the towers has the shape of a parabola, and its center point is 10 feet above ...
October 25, 2014

Physics
as you are riding in a 1650-kg car, you approach a hairpin curve in the road whose radius is 50m. the roadbed is banked inward at anangle of 10 degrees. suppose that the road is dry and that the static friction coefficient between the tires and the asphalt road is .6 what is ...
October 24, 2014

inequalities
5(2x-4)+ 11< 10 -2(6-x)
October 21, 2014

Math
If z^2 = x^2 + y^2 with z>0, dx/dt=3, and dy/dt=6, find dz/dt when x=4 and y=3. Answer: \displaystyle \frac{dz}{dt} =
October 20, 2014

Calculus
At noon, ship A is 40 nautical miles due west of ship B. Ship A is sailing west at 19 knots and ship B is sailing north at 16 knots. How fast (in knots) is the distance between the ships changing at 7 PM?
October 20, 2014

Chem---DrBob222
What is the formula for 2-bromomethylpropane ?
October 14, 2014

Physics
A highway curve with a radius of 750 m is banked properly for a car traveling 100 km/h. If a 1600- kg Porshe 928S rounds the curve at 220 km/h, how much sideways force must the tires exert against the road if the car does not skid?
October 10, 2014

Physics
Use kinematic equations,velocity at max height is zero, so 0=9.75^2-19.6(X-399)=403.9m. Then for speed at ground just do V^2=-19.6(0-403)=88.9 m/s
October 10, 2014

Physics Help Please!!!!
1) A high-speed maglev train is traveling with a changing velocity. what can be said about the forces acting on the train? 2) An automated vehicle in a warehouse is traveling at a constant velocity. what can be said about the forces acting on the vehicle?
October 1, 2014

math
out of 32 students in a class, 5 said they rode their bikes to school. Based on these results, how many of the 800 students ride their bikes to school?
September 28, 2014

English
Thank you SO MUCH.
September 24, 2014

English
Which would be grammatically correct: We both had a goal and objective in mind to get our jobs done. or We both had a goal and objective in mind to get the job done. Thanks!
September 24, 2014

Algebra Based - Physics Help Please!!!!
a) In 1897, Madeline Boardman won the long-drive contest during the U.S. Women's Amateur Golf Tournament. Her winning drive was 125 m. if the ball was hit off the tee at a 45 degree angle, what did the magnitude of its initial velocity have to be for her to make the ...
September 24, 2014

Physics - Force
A high-speed maglev train is traveling with a changing velocity. what can be said about the forces acting on the train? Thanks!
September 24, 2014

physics
If a pull of 350 N accelerates a 38-kg child on ice skates at a rate of 7.3 \frac{m}{s^2}, what is the frictional force acting on the skate?
September 15, 2014

Physics Help Please
a) On the Acme W&W company production line, parts have to be transported 100 m by conveyor belt to a machine area. The parts move at a constant speed of 2.5 m/s. How much time does it take to move a part 100 m? b) On the same conveyor belt as described in problem a), the part ...
September 11, 2014

Physics Help
a) On the Acme W&W company production line, parts have to be transported 100 m by conveyor belt to a machine area. The parts move at a constant speed of 2.5 m/s. How much time does it take to move a part 100 m? On the same conveyor belt as described in problem a), the part ...
September 11, 2014

Physics Help
On the Acme W&W company production line, parts have to be transported 100 m by conveyor belt to a machine area. The parts move at a constant speed of 2.5 m/s. How much time does it take to move a part 100 m? Show steps please! Thank you!
September 11, 2014

6th Grade Math
Thank you to all that helped
September 2, 2014

6th Grade Math
Can someone please show me how to work this problem below? Jacob earned $80 babysitting and deposited the money into his savings account. The next week he sepnt $85 on video games. Use the integers to describe the weekly changes in Jacob's saving account balance.
September 2, 2014

Statics
If both the projection Pa and component Fb of the force F are 305 N, determine the magnitude F and the orientation è of the b-axis. The angle between the negative y axis and the a- axis is 70 degrees. The angle between the negative y axis and the force F is 108 degrees...
September 1, 2014

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