# 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*

**Business**

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*

**Business Communication**

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*

**3rd grade math**

how do explain how to break apart 3 x 9 to help me multipy

*January 11, 2011*

**reading**

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*

**Physics ( check answers)**

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*

**12th grade math**

34

*December 1, 2010*