02/22/17

I am trying to find the derivative in order to find the slope of a tangent line but I am getting stuck, could you please correct me?
using M(x) = 3(1 − ex) find the slope of the point where the graph m(x) crosses the x axis I interpreted this to mean to take the derivative when y=0. I took the derivative and got -3ex but that... more
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02/22/17

Taking a derivative using the chain rule.
I was given the function g(t)=(ln 15)t This derivative I know to use the chain rule however I am a little confused on how. Since t is the variable in the exponent would you do ln(ln15)*(ln15)t or... more
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02/21/17

Chemistry help
An object has a mass of 5.800 grams. This object is dropped into a gradulated cylinder containing 25.0 mL of water, causing the level of the water to rise to 45.8 mL. What is the density of the... more
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02/21/17

268+275+242+259=find the greatest sum. Then find the smallest sum
how do you find the answer for this 2nd grade math problem? 
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02/21/17

If one amoeba is placed in a bucket. Each minute it doubles. If the bucket is full in 40 min when is it half full
explain this please
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02/21/17

Physics Electricity
What is the magnetic field in air 0.05 m away from a long straight wire carrying current of 15A?       An air-core solenoid with 2000 loops is 0.60 m long and has a diameter of 0.02 m.  If the... more
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02/21/17

Assuming all matrices are nxn and invertible solve for D ? Is my answer right?
ABCT DBAT C= ABT    My answer is (CT)-1B-1 BT C-1 (AT)-1 B-1 
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02/20/17

if a number is 20% more than the other, how much percent is the second number less than the first?
options a.37/3% b.50/3% c.49/3% d.none
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02/19/17

What is the equation of a vertical line that has an x-intercept of −7?
I need help
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02/19/17

Assuming all matrices are nxn and invertible Solve for D ( inverses; algebraic properties of matrices) Is my answer right ?
CT B-1 A2 BAC-1 DA-2 BT C-2 = CT   My answer is : D= BA-2 B-1 A-1 CA2 (BT)-1 C2
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02/19/17

You see a highway warning sign that says, “6% downgrade, trucks use lower gear.” Approximately what is a 6% slope, when expressed in degrees?
 You see a highway warning sign that says, “6% downgrade, trucks use lower gear.” Approximately what is a 6% slope, when expressed in degrees?
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02/19/17

a) How many hydrogen atoms, which measure 0.1nm across, will fit across a single caesium atom with a diameter of 0.6nm ?
b) The diameter of a copper atom is approx 0.3nm. How many copper atoms could be lined up across a pin head measuring 1.5mm (1,500,000nm)?   (to convert m to nm multply by 1000,000,000. To... more
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02/19/17

when do I use absolute value brackets in the electric field equation E=k(q)/r^2 ?
when do I use the absolute value brackets on the point charge?   E = k (q)/r^2    vs   E = k |q|/r^2    ?
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02/18/17

Simplify (2AC^-1)^-1 (AC^-1) (AC^-1)^-1 AD^-1 ( linear algebra)
Simplify ( 2AC-1)-1 (AC-1) (AC-1)-1 AD-1    First off, Im not even sure what the topic of this question is. In my book , it just " simplify" so im having a hard time finding a youtube video on... more
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02/18/17

Solving for A ( with inverses and transpose)
(2AT + 3T)-1 = [-4 3 ]                       [ 1 -1 ]    Please show me steps. I dont understand how to undo the inverse and the transpose and get rid of the 2 and 3
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02/18/17

Could you show me how to solve
2 ___         21            M ____  =  ___ 12           21
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02/18/17

why do wider slick tires gain more traction when surface area does not affect force of friction
Explain why putting wider slick tires on your car improves traction if we dont see surface are in the equation. FF= meu×mass×gravity
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02/18/17

whats the difference between kinetic energy and momemtum
I was just trying to get an explanation of the difference between momentum and kinetic energy. I know the formulas for each but i cant grasp how they are different.
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02/18/17

iam so lost someone hellp me step by step please
  slove   6x2+7x=20
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02/17/17

The product of a number and 4 is at least -12.
I need help with my middle school homework!
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02/17/17

system of equations
Solve the following system of equations. x+5y=5   x=4-5y
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02/16/17

Enter the polynomial function with the least degree and a leading coefficient of 1 that has the given zeros. 4i, 3, and −3
The polynomial function with the given zeros is p(x)=
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02/16/17

True or False? Despite fierce battles and substantial damage to manufacturing, urban areas, and infrastructure during World War II, Russia did not have a large
True or False? Despite fierce battles and substantial damage to manufacturing, urban areas, and infrastructure during World War II, Russia did not have a large number of casualties from the war.
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02/16/17

Electric Potential
Part a is as follows: A long cylindrical insulator has a uniform charge density of 1.89 μC/m3 and a radius of 5 cm. What is the electric field inside the insulator at a distance of 4 cm? Answer in... more
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02/16/17

What is the equation of the line that is parallel to the given line and passes through the point (–2, 2)
the point they give you is (-5,-4) and (0,-3) 
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