06/23/17

A rock is thrown horizontally from a cliff with a speed of 15 m/s. It falls 1/2 of the cliff height in the last three seconds of its fall. Find free fall time.

Also find the find the cliff height and the horizontal distance from the cliff. 

Waves and energy

"When you speak to someone, the air molecules travel from your voice box into the person's ear, thus carrying the sound wave to them."   Is the above statement correct? Explain your... more

02/23/17

percentage of a normal curve

What percentage of a normal curve falls above +1 standard deviation?

05/01/15

Give answer in simplest radical form

give answer in simplest radical form    5x^2-3=0

05/01/15

simplify this equation

5 radical 50/3 + radical 2 -3 radical 18

05/01/15

express in simplest radical form

express in simplest radical form  1+1/radical 2

04/17/15

if y varies directly to the square of x and y=16 when x=40 then find x when y=64

if y varies directly to the square of x and y=16 when x=40 then find x when y=64

word problem help

Assume the exponential growth model A(t)=A0e^kt and a world population of 6.7 billion in 2003.If the  population must stay below 19 billion during the next 100 years, what is the maximum acceptable... more

04/17/15

d/dx ( sin^2 x y cos x y = 1) 

Find the derivative of the following functions:

URGENT ANSWER ASAP

An ostrich egg has about the same volume as a sphere with a diameter of 5 inches. If the eggshell is 1/12 inch thick, find the volume of just the shell, NOT including the interior of the egg. Round... more

04/17/15

A caterer offers 24 different types of dessert how many banquets menus can be offered if each includes 5 different type of desserts?

A caterer offers 24 different types of dessert how many banquets menus can be offered if each includes 5 different type of desserts?

Does SiO2 lattice structure contain any intermolecular attraction forces?

I was told by my teacher that SiO2 lattice does not contain any intermolecular attraction forces. But if so, how is the lattice kept as it is? And is there any method to exactly know whether a... more

In the xy-coordinate plane, point P has a coordinates (6,2) Point Q has coordinate (18,8).

If Point x is on segment PQ so that the length of segment PX is twice the length of segment XQ what are the coordinates of point x?

log (x + 16) = log x + log 16

4. Solve the logarithmic equation. Be sure to reject any value of x that is not in the domain of the original logarithmic expression. Give the exact answer.log (x + 16) = log x + log 16

02/09/14

How to simplify cot2x/csc2x

The goal is to simplify the trig indentity expression as much as possible using the different fundamentals of identities like reciprocal identities, quotient identities, and pythagorean identities

isolating the letter C =b(1/c-1/d)

A= b(1/c-1/d)

01/20/14

Homologous series.

Homologous series have same chemical property why?Methane and ethane have different chemical property or not !If yes then why just adding a hetero atom in both compound can make both compound... more

01/15/14

Optical Density

What Is Optical Density? Difference between optical and mass density!

01/12/14

What is the standard form of an equation of the line that passes through the points (-1,4) and (-7,-5)?

I've tried my hardest on the problem, it's quite hard...

01/12/14

What is the standard form of an equation that passes through the point (-1,5) and has a slope of 1/2?

It is really hard and I don't get it someone answer quick

How do you find a in parabola equations using just the vertex and the focus?

I know you could plug everything in and figure it out that way but I can't do that because I don't have another point on the parabola. For example: vertex:(-1,-3) focus:(-1,0)

f(x)=4/5x-7 find inverse

how do I find inverse when there is a fraction  

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