Thursday
April 24, 2014

Posts by Robert


Total # Posts: 776

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

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

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 fr...

geometry
4x + 7 = 5x - 4

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 a...

ALGEBRA
what does the F and g mean at the beginning of any function

algebra
g(x)=10/x+7 what this things domain

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?

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?

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.

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 he...

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 ...

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 respe...

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

geometry
Find side c if side a = 10 inches and side b = 6 inches.

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

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

math
1/3x+5(12-x)=2x

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?

Statistics
There is no choices

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?

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

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

finance
Simple interest

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 fr...

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?

SCIENCE
DEFINE AND GIVE EXAMPLES 1. Sexual reproduction 2. asexual reproduction

SQL
Thank you sir:)

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 f...

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 de...

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

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

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. Wha...

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

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?

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 t...

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 ma...

social studies
social studies

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.

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 t...

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

Physics concept question
solved it.

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:// pos...

Physics - Current Loop
Solved it.

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?

Physics- Charge in electromagnetic field
Solved it. Thanks.

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 t...

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

Math
A= (1/2)(b*h)

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

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?

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+?

Algebra
apples- 55 cents oranges- 75 cents

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.

Life orientation
Identify 5 practices in contravention of the basic conditions of employment act?

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 t...

physics
north-eastern

physics
north-eastern

Physical science
The acceleration due to gravity on earth

world history
some parts of spain remained under muslim control for how many years

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?

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

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

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

Algebra
Thank you so much!!!(:

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

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

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

Algebra
How do you solve the equations? ):

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?

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

reading
Name some symbols for science fiction?

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

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?

Physics
Thank you!

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?

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 fou...

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

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

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

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?

Physics
Ahhh, thank you, a lot clearer :)

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

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.

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.

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

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

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

12th grade math
34

Algebra 7th Grade
is it correct?

Algebra 7th Grade
-5576

Algebra 7th Grade
what is -8(700-3)= (using distributive property)

Algebra 7th Grade
what is -8(700-3)= (using distributive property)

Algebra 7th Grade
what is -8(700-3)= (using distributive property)

geometry
a dog toy is constructed in the shape of a cylinder with a length of 6.8 in. The cylinder has a hemisphere at each end. The diameter is 1-9 in. Find the volume.

Physics
Never mind. I realized that you want the force of friction to equal the force of tension. Thus when you set it up, you find the normal force and subtract the current way. Ft=Ff Ft=mu x N N-Ma=Mc

Physics
In Fig. 6-25, blocks A and B have weights of 49 N and 21 N, respectively. (a) Determine the minimum weight of block C to keep A from sliding, if µs between A and the table is 0.20. (b) Block C suddenly is lifted off A. What is the acceleration of block A, if µk bet...

math
(6x-7) 5x

algebra II
find the area of a triangle fgh f(1,4) g(-2,-3) h(3,-2) using matricies

Physics earth & Space
toward what direction, north or south would you look to the sun at noon on june 21-22 if you lived at the following latitudes

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