Monday
March 27, 2017

# Posts by robert

Total # Posts: 988

math
find an equation of the tangent line to the curve at the given point: y=sqrt(1+x^3), (2,3)
November 1, 2011

Chemistry
Our class did an expeiment of adding sodium carbonate and calcium chloride. The experiment only yielded 28% of the calculated yield. The class did the experiment as a group (there are only 4 students in our class) and the experiment was closely supervised by our teacher to ...
October 26, 2011

Chem
64----> 32---> 16----->8 1 2 3 There are 3 half life. Divide 42/3 = 14 days
October 19, 2011

Algebra
yo momma
October 13, 2011

physics
A dog with a mass of 15kg jumps forward at 0.50m/s to catch a frisbee coming in the opposite direction at 5m/s. the dog catches the frisbee in its mouth and in doing so its velocity drops to 0.45m/s. What was the mass of the frisbee?
October 12, 2011

Math Help
yes it is, as: w^2-13w+42=0 (w-7)(w-6)=0
October 12, 2011

math
what is 33% of 61
October 4, 2011

math
5 items = a mean of 98 6 items =mean of 102 possible anwers 25,24,117,122 please show how to do
September 29, 2011

accounting
Ayres Services acquired an asset for \$80 million in 2011. The asset is depreciated for financial reporting purposes over four years on a straight-line basis (no residual value). For tax purposes the asset's cost is depreciated by MACRS. The enacted tax rate is 40%. Amounts...
September 28, 2011

chemistry 1025
a shoe box measures 12.0 inches by 5.5 inches by 3.5 inches. calculate its volume in cubic centimeters.
September 27, 2011

physics
Carol is correct. I just had this problem on my online test.
September 24, 2011

math
If Jill climbed 100 feet more, how many feet above sea level would she be?
September 9, 2011

Math
10 ways to make .50 only using quarters, nickles and dimes?
August 30, 2011

Math
0.810g/mL-1.375g/mL-2.046g/mL are these numbers precise or accurate or both?
August 30, 2011

Math
3. A processor makes two components, A and B, which are then packaged together as the final product (each product sold contains one A and one B). The processor can do only one component at a time: either it can make As or it can make Bs. There is a setup time when switching ...
August 28, 2011

geometry
4x + 7 = 5x - 4
August 25, 2011

Psychology
compare and contrast the strengths and weaknesses of two different approaches to study the following issue: You have developed a new drug that you believe is effective in reducing appetite. As a result of some preliminary research, you have been given a small grant to design ...
August 14, 2011

ALGEBRA
what does the F and g mean at the beginning of any function
August 11, 2011

algebra
g(x)=10/x+7 what this things domain
August 11, 2011

Math
The formula h=48t-16t^2 gives the height, h, in feet, of an object projected into the air after t seconds. If an object is propelled upward, at what time(s) will it reach a height of 32 feet above the ground?
July 27, 2011

What types of technology do people utilize to communicate? How does technology change the way people communicate? What does technology bring to communication other than the technology itself?
July 27, 2011

The way business communication is conducted [Passive voice] in the workplace experiences regular changes with the advances in technology that makes communication faster and easier.
July 26, 2011

calculus
this is a optimization problem A construction company has been offered a contract for \$7.8 million to construct and operate a trucking route for five years to transport ore from a mine site to a smelter. The smelter is located on a major highway, and the mine is 3 km into a ...
July 25, 2011

Chemistry
Ethanol, C2H5OH or C2H6O, is mixed with gasoline and sold as gasohol. Given the following thermo-chemical reaction, calculate the kilograms (kg) of CO2 produced when enough ethanol is combusted to provide (or give off) 369 kJ of heat: C2H5OH (l) + 3 O2 (g) --> 2 CO2 (g) +3 ...
July 12, 2011

physics
Suppose 2 balls of same mass are held by 4 ropes, 2 for each ball. One ball is held by 2 ropes fastened at same height to something and the other at different heights. If the angles made by each respective pair of ropes(eg. right to right) are equal, are tensions in each ...
June 27, 2011

Math
Solve: sin2xsinx - cos2xcosx = 1, x domain [-pi, pi].
June 16, 2011

geometry
Find side c if side a = 10 inches and side b = 6 inches.
June 15, 2011

Math
If Brad invests \$2700 in an account paying 11% compounded quarterly. How much is in the account after 6 months?
June 14, 2011

math
1/3x+5(12-x)=2x what would "x" equal? how did you solve it?
June 7, 2011

math
1/3x+5(12-x)=2x
June 7, 2011

math
Why does the inequality sign change when both sides are multiplied or divided by a negative number? Does this happen with equations? Why or why not?
May 16, 2011

Statistics
There is no choices
May 12, 2011

Statistics
Suppose I reported the length f a book shelf to be 2.12 meters. What range would you expect the actual length of the bookshelf to lie in?
May 12, 2011

Calculus
What is the antiderivative of the cube root of (x^2)+2
May 2, 2011

Calculus
What is the antiderivative of the cube root of (x^2)+2
May 2, 2011

finance
Simple interest
May 1, 2011

physics hw
A 300. kg roller coaster car is traveling at a constant speed of 15 m/s over a hill with a radius of curvature of 30. m. b. What is the normal force acting on the car at the top of the hill? c. Assume that the car is at the intersection of the radius and the hill and that a ...
May 1, 2011

math
Amy has \$200 less invested at 9% than she does at 6.5%. If the annual return from the two investments is the same, how much is invested at each rate?
April 28, 2011

SCIENCE
DEFINE AND GIVE EXAMPLES 1. Sexual reproduction 2. asexual reproduction
April 27, 2011

SQL
Thank you sir:)
April 15, 2011

SQL
MrMath, please do not post aany answers to this question. My daughter, thinking she would help me with hoemwork posted this. I appreciate your time but do not need any assistance as I have a good understanding of the material. I have asked the site to delete this post. Sorry ...
April 15, 2011

SQL
1- A SQL statement is needed to create a stored procedure that has one input parameter of data type int. The stored proc selects the supplierId field and the total, or sum, of all Count field values for each group of supplierId fields from the Part table. The Part table was ...
April 15, 2011

Inorganic Chem
If you forget to add phenolphthalein solution to a vinegar solution(after adding NaOH solution), how might you salvage the titration?
April 13, 2011

Science/Math
A STONE MEASURED 25KG WAS ACTULLAY 20 KG WHAT WAS THE PERCENT DEVIATION OF THIS MEASURMENT
April 13, 2011

SCI207:Dependence of Man on the Environment
A farmer planted a field of BT 123 corn and wants to estimate the yield in terms of bushels per acre. He counts 22 ears in 1/1000 of an acre. He determines that each ear has about 700 kernels on average. He also knows that a bushel contains about 90 000 kernels on average. ...
April 12, 2011

physics
A ball is rolling in a straight line at a constant speed. Another ball is motionless. what do they have in common?
April 9, 2011

Chem
1-No 2-No 3-Yes 4-Yes 5-Yes
April 9, 2011

chemistry
a 20.0-L vessel at 700 K initially contains HI (g) at a pressure of 6.20 atm;at equilibrium, it is found that the partial pressure of H2 (g) is .600 atm. What is the partial pressure of HI (g) at equilibrium?
March 31, 2011

Physics
a 2 kg block slides down a frictionless incline from point A to point B. A force(magnitude P=3N) acts on the block between A and B, as shown. Points A and B are 2 m apart. If the kinetic energy of the block at A is 10 J, and the work done by gravity is 20J, what is the KE of ...
March 24, 2011

Physics
A 305 kg piano slides 4.0 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40. (a) Calculate the force exerted by the man. (b) Calculate the work done by the ...
March 23, 2011

social studies
social studies
March 20, 2011

Health
This site looks not bad, but I personally not like this blood pressure chart. It hard to understand, and i using mostly bloodpressuremagazine[dot]com to check my blood pressure readings. It nice what all in one place, like normal blood pressure and hypertension.
March 20, 2011

Math
An NFL punter at the 15-yard line kicks a football with an initial velocity of 95 feet per second at an angle of elevation of 28 degrees. Let (t) be the elapsed time since the football is kicked. a. Write the parametric equations of this problem. b. With (t)=0 at the time of ...
March 15, 2011

chemistry
how many grams of manganese (4) oxide are needed to make 5.6 liters of a 2.1 solution
March 10, 2011

Physics concept question
solved it.
March 7, 2011

Physics concept question
A long straight horizontal wire carries a current I = 2.10 A to the left. A positive 1.00 C charge moves to the right at a distance 4.50 m above the wire at constant speed v = 2250 m/s. What are the magnitude and the direction of the magnetic force on the charge? h t tp:// ...
March 7, 2011

Physics - Current Loop
Solved it.
March 7, 2011

Physics - Current Loop
A current loop in a motor has an area of 0.85 cm^2. It carries a 240 mA current in a uniform field of 0.62 T. What is the magnitude of the maximum torque on the current loop?
March 7, 2011

Physics- Charge in electromagnetic field
Solved it. Thanks.
March 7, 2011

Physics- Charge in electromagnetic field
An antiproton (which has the same properties as a proton except that its charge is -e) is moving in the combined electric and magnetic fields of the figure: h tt p://post image. org/image/2sh3s3hs4/ What are the magnitude and direction of the antiproton's acceleration at ...
March 7, 2011

Math
or to be more specific, one half the base times the height. so one half of 16 times 31, or 8 times 31.
March 3, 2011

Math
A= (1/2)(b*h)
March 3, 2011

Calculus
i figured out the f^-1(x) is the ln ((-13x-6)/(17x-5)) i just need a and b plz help before 11 pm
March 3, 2011

Calculus
f(x) = (5e^x-6)/(17e^x+13) find f^-1(x). since the domain of f^-1(x) is in the open interval (a, b) what is a and and b?
March 3, 2011

chemistry
Iron(II) can be oxidized by an acidic K2Cr2O7 solution according to the net ionic equation. Cr2O72− + 6 Fe2+ + 14 H+ 2 Cr3+ + 6 Fe3+ + 7 H2O If it takes 44.0 mL of 0.0250 M K2Cr2O7 to titrate 25.0 mL of a solution containing Fe2+, what is the molar concentration of Fe2+?
March 3, 2011

Algebra
apples- 55 cents oranges- 75 cents
March 3, 2011

statistics
The results of a medical test show that of 66 people selected at random who were given the test, 3 tested positive and 63 tested negative. Determine the odds in favor of a person selected at random testing positive on the test.
February 24, 2011

Life orientation
Identify 5 practices in contravention of the basic conditions of employment act?
February 21, 2011

physics
the coefficient of restitution between the ball and the floor is 0.60 If the ball is drop from rest at the height of 6.6 m from the floor. Find a) what is the maximum height will the ball attain after the first bounce. b) how much kinetic energy is lost duirng the impact if ...
February 21, 2011

physics
north-eastern
February 18, 2011

Physical science
The acceleration due to gravity on earth
February 18, 2011

world history
some parts of spain remained under muslim control for how many years
February 17, 2011

Physics with Calc
A point charge of 1.8uC (microcoulumbs) is at the center of a Gaussian cube 55 cm on edge. What is the net electric flux through the surface?
February 5, 2011

Chemistry
Need help balancing this equation, just the coeffecients, do not need to balance the charges. The numbers are subscripts: Ca0.41Mg0.36Mn0.50Fe1.76Al2Si3O12 + H + H20 <---> Al(OH)3 + FeOOH + MnO2 + Ca + Mg + Si(OH)4
January 29, 2011

geometry
How to find the area of a KITE when the length of only one diagonal is given, with two pairs of congruent sides but with no length described
January 25, 2011

Algebra
7. Marcus can paint a garage in 3 hours. Gina can paint the same garage in 2 hours. How long will it take Marcus and Gina to paint the garage if they work together
January 14, 2011

Algebra
Thank you so much!!!(:
January 14, 2011

Algebra
How many pounds of apples costing .64 per pound must be added to 30 pounds of apples costing .49 per pound to create a mixture that would cost .58 per pround
January 14, 2011

Algebra
x = adult tkts y = student tkts 3x = value of adult tkts 1.5y = value of student tkts x + y = 105 3x + 1.5y = 250
January 14, 2011

Algebra
x = adult tkts y = student tkts 3x = value of adult tkts 1.5y = value of student tkts x + y = 105 3x + 1.5y = 250
January 14, 2011

Algebra
How do you solve the equations? ):
January 14, 2011

Algebra
Michelle sold tickets for the basketball game. Each adult ticket costs 3\$ and each student ticket costs 1.50. There were 105 tickets sold for a total of 250\$. How many of each type of ticket were sold?
January 14, 2011

how do explain how to break apart 3 x 9 to help me multipy
January 11, 2011

Name some symbols for science fiction?
December 19, 2010

US History
It would help him throughout his presidency,because that was his advisors or cabinet members.
December 19, 2010

physics
In hitting a stationary pool ball with the mass of 170 g, a billiards player gives the ball impulse of 6.0 N-s. At what speed will the pool ball move toward the hole?
December 16, 2010

Physics
Thank you!
December 13, 2010

Physics
Can't figure it out. Does it have something to do with finding w? w=2pi/T = square root of k/m but I don't have K or T?
December 13, 2010

Physics
A 1125 kg car carrying four 80 kg people travels over a rough "washboard" dirt road with corrugations 4.0 m apart which causes the car to bounce on its spring suspension. The car bounces with maximum amplitude when its speed is 17 km/h. The car now stops, and the ...
December 13, 2010

fractions
6/10 is how long he taught 8th grade so 10 - 6 = 4 is how long he taught something else. The new fraction would be 4/10 but if you simplify it, 2 being the common factor in both you would get 2/5 4 = 2 * 2 10 = 2 * 5
December 12, 2010

Physics
After reading your comment and picturing a see saw, now I get it. Thank you soooo much and have a happy holiday :)
December 12, 2010

Physics
Another question in regards to CT. I know CT refers to the clockwise turn of the meter stick but how can you picture it going in that direction? With no weight on the ruler, isn't it at an equilibrium?
December 12, 2010

Physics
Ahhh, thank you, a lot clearer :)
December 12, 2010

Physics
Thank you so much. I'm confused about one thing though, what does CCT and CT stand for? is it Torque? Or is that another way for center of mass
December 12, 2010

Physics
A meter stick balances horizontally on a knife-edge at the 50.0 cm mark. With two 5.00 g coins stacked over the 7.0 cm mark, the stick is found to balance at the 41.0 cm mark. What is the mass of the meter stick? The answer is 38g but I don't understand how to get it.
December 12, 2010

psycology
Do an ESSAY Using Kohlberg's three levels and six stages of moral reasoning, create a character that passes through each stage and explain how she/he responds to moral dilemmas present at each stage.
December 11, 2010

warren moon throws a footbal with a velocity of 20 m/s at an angle of 30 degrees with the horizontal. air resistance may be ignored. how much time is required for the football to reach the highest point of the trajectory
December 9, 2010

science
How to write 5,800 million metric tons in standard form and in scientific notation?
December 7, 2010

science
How to write 5,800 million metric tons in standard form and in scientific notation?
December 7, 2010

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