Wednesday

October 7, 2015
Total # Posts: 1,154

**Calculus**

1) there's an identity for d/dx (cot x) which = csc^2 x. So the answer to 1) is csc^2 x + cos x. 3) use the derivative multiplying rule first *d(second) + second *d(first): y' = x*(-csc(x)*cot(x)) + csc(x)*1 -- there may be some simplification you can do, but I don'...
*September 30, 2007*

**calculus urgent**

Break the graph up into a bunch of increments, each with the same x-axis distance between them. The more the graph flips from up to down, the more increments you need. (The more you have, the better your derivative graph will be.) Write down the (x,y) coordinates of each point...
*September 30, 2007*

**calc**

The function f is defined by f(x) = x^3 - x^2 - 4x + 4 The point (a,b) is on the graph of f and the line tangent to the graph at (a,b) passes thru the point (0, -8) which is not on the graph of f. Find the values of a and b. I have no clue how to solve this I know the ...
*September 30, 2007*

**calculus**

The function f is defined by f(x) = x^3 - x^2 - 4x + 4 The point (a,b) is on the graph of f and the line tangent to the graph at (a,b) passes thru the point (0, -8) which is not on the graph of f. Find the values of a and b. I have no clue how to solve this I know the ...
*September 30, 2007*

**English**

You know for the story "The Prosepector's Trail" by Cathy Jewison. Im supposed to be Norman and write a letter to Jennifer 1 year after Jennifer left Norman. Would Norman want Jennifer back or would he want to have a divorce with her and leave her? Please help
*September 25, 2007*

**Math**

It's impossible.
*September 24, 2007*

**math**

thanks for your help
*September 15, 2007*

**math**

a rectangular prism 32x32x500 inside another prism 46x46x500. How to calculate the center of gravity for the larger prism?
*September 15, 2007*

**physics**

I though about the volume, this is what I have: F=72m^3x1000Km^3x9.8= 705600 KN/m^3 or 705.6 N/m^3. Is this right or no need to consider gravity?
*September 14, 2007*

**physics**

tank of water with L=6m, W=3m, H=4m. 1) Find the force on the bottom of the tank from water. (ignore atmosphere pressure). 2) If the door to the tank is 1.5m by 1.5m and it is 2.25m (center bottom)from the edge of the tank, what is the force on the door and the position of ...
*September 14, 2007*

**Calc 3**

T=100J r=.9j F=F (0i+1j+3k)/sq root 1^2+3^2) Replace the values on the formula and solve for F.
*September 13, 2007*

**calc**

(x2 - a2)/x-a x ≠ a 8 x = a At what value of a would the function be continuous?
*September 11, 2007*

**Math**

Thank you so much. I love you. xD
*September 11, 2007*

**Math**

Okay. I have questions like "Walks ten meters in 3 seconds" . How do I find her walking rate. After that I have to find an equation to represent the distance she walks in t seconds. Please help me...Im very confused and terribe at math
*September 11, 2007*

**English**

THANK YOU, Ms. Sue
*September 6, 2007*

**English**

Thank you again Ms. Sue may I ask your help with two other questions? Simple Subject: Gold miners were Jack's best customers. (gold miners) A cellular telephone is one example of this change. (cellular telephone)
*September 6, 2007*

**English**

Thank you, Ms. Sue what about CP That mountain is the tallest one around here. (in the tallest one around here) The fire destroyed the old house. (destroyed the old house) The Puppy limped toward the old man. (limped toward the old man) are my answers correct.
*September 6, 2007*

**English**

Complete Predicate. The Snake wrapped itself around the tree. (wrapped itself) is that the correct answer?
*September 6, 2007*

**science**

Are there any particular rules that govern whether or not a complex ion will form from a certain ion or do you just have to know them?
*September 3, 2007*

**science**

hi wassup
*August 27, 2007*

**science**

what is used for storing acids and bases?
*August 27, 2007*

**Check this please**

Avondale and Newtown are 45 miles apart. How many inches is this on a map with a scale 1inch=20miles? I set up a proportion: in/miles= 1/20=n/45 n= 2 and 1/4 in on this map 2 1/4 inches is correct. 1 inch = 20 miles 2 inches = 40 miles 1/4 inch = 5 miles =) Thank you for ...
*July 2, 2007*

**writing**

This is the assignment: Reread either Andy Rooney’s essay on page 96 or Sarah Penning’s essay on page. 97. Select either essay as your starting point and discuss the terms they write about. What is your reaction to the thesis of either in relation to accepted ...
*June 27, 2007*

**Chemistry**

Therefore Iodine would have an oxidation state of +1 not Br.
*June 13, 2007*

**Chemistry**

Iodine doesn't have an oxidation state of -1 in the molecule I-Br because it is a heteronuclear molecule. Br is more electronegative therefore it would have an oxidation state of +1.
*June 13, 2007*

**5th Grade math**

What is a partial-products algorithm. For example 87*65=? How do you do it and show your work? Here is how Chicago Math does it: 87 x65 multiply 80 x 60.....4800 multiply 7 x 60..... 420 multiply 5 x 80.......400 multlply 5 x 7 ........35 add the products.
*April 18, 2007*

**Math**

four gallons of gasoline weigh 25 pounds. find the unit rate in dollars per ounce
*April 17, 2007*

**stats**

In a given situation, suppose H0 (null hypothesis) was not rejected at alpha= .02. Would H0 also be retained at alpha = .01? would H0 also be retained at alpha = .05? I'm thinking yes and can't tell. I agree If you did not reject Ho at P = .02, You would definitely not...
*March 30, 2007*

**science**

a coomon mineral in solid form Quartz, among thousands of choices. Some are more common than others.
*March 23, 2007*

**Physics**

A personne walking at a speed of 1.7m/s see's a stoped bus 25m from him. At this moment this person starts to run with an acceleration of 1,3m/s2. After 4 secondes this personne has reached his maximum speed et it stays constant, but at the same time the bus starts moving ...
*March 22, 2007*

**Language Arts class**

Can you help me unscramble these words to make a sentence? bloom white lilies the were petals with and stems graceful the white bloom lilies with petals and stems were graceful . I don't think Keesha's answer makes sense, do you? Please rethink this and let us know ...
*March 22, 2007*

**Biology**

In the inner mitchondrial membrane, hydrogen ions... A)are pumped in olny one direction. B)are pumped in both directions C)leak across in only one direction D)leak across in both directions http://cellbio.utmb.edu/cellbio/mitochondria_1.htm
*February 19, 2007*

**Math**

How many kilometers are in 153900 mm? do i just divide by 1000? (Broken Link Removed) Looks like it! =) 30lb=_____kg?
*February 14, 2007*

**math**

what constant acceleration, in SI units, must a car have to go from zero to 60mph in 10s? How far has the car traveled when it reaches 60mph? First, recognize or calculate that the final velocity is 60 mph = 88.00 ft/s = 26.822 m/s Then divided the metric (SI) final velocity ...
*February 12, 2007*

**chemistry**

N2H4(g) + H2(g) 2 NH3(g) H1 = –1876 kJ 3 H2(g) + N2(g) 2 NH3(g) H2 = –922 kJ The H f for the formation of hydrazine: 2 H2(g) + N2(g) N2H4(g) will be ? kJ/mol. Turn equation 1 around and change the sign of H1. Add to equation 2, cancel like molecules appearing on both...
*February 9, 2007*

**physics**

As you look out of your dorm window, a flower pot suddenly falls past. The pot is visible for a time t, and the vertical length of your window is L_w. Take down to be the positive direction, so that downward velocities are positive and the acceleration due to gravity is the ...
*January 30, 2007*

**Physics**

i meant to say voltage and use the equation P = IV - then multiply by 2 since it's both lines KBAI
*January 30, 2007*

**Physics**

scratch that - no subtraction. just your answer as it is i think
*January 30, 2007*

**Physics**

RIGHT, well this might be a bit late but i'm another physics student and just found the solution. Basically you want to take your current from part A - and your resistance from part B, plug them in into the equation P = I^2R and then subtract your answer from the original ...
*January 30, 2007*

**math**

what is the percent of 7 over 10 (7/10)x100=70% 7 - 10 or 70 - 100
*January 30, 2007*

**calc**

What are the intercepting points of y^2=-4x and x^2=y I set both equations equal to 0, but only get x=0 and there is another intercepting point. please help! You can solve for one of the equation and substitute it into the other equation. In this case you already have y=x^2 so...
*December 7, 2006*

**calc**

What is dy/dx of y=12/12X-y^3 ???? Any idea anyone??? y=12/12X-y^3 I assume you mean... y=12/(12X-y^3) 12Xy-y^4=12 12x dy/dx + 12y -4y^3 dy/dx=0 dy/dx (12x -4y^3)=-12y solve for dy/dx
*December 7, 2006*

**Chem 12**

How can I do this: 3KNO3(aq)+ Fe(SCN)3(aq) + NaOH(aq) <---> ? what do you have to do? write the products it makes. I don't know the products it makes. I have to figure out what adding all those produces. Im not sure its even possible? yes it is possible. first of all...
*December 3, 2006*

**Physics**

In a hydraulic system, piston 1 has a surface area of 100 cm2, and piston 2 has a surface area of 900 cm2. A force of 150 N is exerted on piston 1 of the hydraulic lift. What force will be exerted on piston 2?
*November 17, 2006*

**chem**

The chemical method of analysis in determination of the blood alcohol content %BAC is: K2Cr2O7 + H2SO4 + C2H5OH ---> Cr2(SO4)3 + K2SO4 + CH3COOH + H2O What are the stoichiometric coefficients for the reaction above? Cr is reduced from +6 each on the left to +3 each on the ...
*November 8, 2006*

**acids and alkalis**

These kids should learn to type properly, Anyway back onto subject...er well nothing for me to really answer lol, All been done in the previous questions.
*November 4, 2006*

**chem**

assuming you have o.4g of Y(OH)3, calculate the mass of BaO2 required to react stoichiometrically to produce YBa2Cu3O7. Now calculate the mass of CuO. Please HELP! Write the balanced equation. Then, calculate the moles of Y hydroxide from .4 g. Then, notice from the balanced ...
*October 24, 2006*

**chem**

assuming you have o.4g of Y(OH)3, calculate the mass of Ba)2 required to produce YBa2Cu3O7. Is that BaO2 for Ba)2? Is that really BaO2 or BaO. BaO2 is barium peroxide, not oxide. Y(OH)3 ==> YBa2Cu3O7 Step 1. Convert 0.4g Y(OH)3 to mols Y(OH)3. Step 2. Multiply by 2 to ...
*October 24, 2006*

**geometry**

if a plane leaves a horizontal at an angle of 60 degrees and at 1 minute reaches a point of 12 miles how fast is the plane going.... "reaches a point of 12 miles" is ambiguous. Do you mean 12 miles in the air (elevation), perpendicular to the ground? Or, do you mean ...
*October 15, 2006*

**science**

Two bumper cars collide. Both cars stop. How do you know that a force has acted on both cars? did the cars change velocity? (yes, they stopped). Newton's law says that things in motion will stay in motion unless a xxxxx acts.
*October 10, 2006*

**English**

I am writing a feasiability study on an investment made my a hypothetical company into an internet news company. This idea sprung from my inquiry question :"What does the media hold in store for us?" Has anyone got any suggestions as to what fontant should be in ...
*September 28, 2006*

**Math**

Answer this please!!! Noelani was saving Luscious Lemon soda coupons, which came in the caps of the Luscious Lemon sodo bottles. There were two kinds of coupons: 5-point coupons and 2-point coupons. So far, she had collected 23 coupons, worth 76 points. How many 5-point and 2-...
*September 18, 2006*

**Stoichiometry problem**

Confused and Jason, same person? Chemistry itself is definitely not pointless. Imagine where you'd be without the miracles that chemistry presents us in everyday life: Plastics, Medicine, Cars, Reliable Machines, Colors in Clothing and Other Products, Flavored Drinks, ...
*September 9, 2006*

**WORD PROCESSING AND KEYBOARDING**

1.B 2.C. 3.D 4.B 5.C 6.B 7.C 8.D 9.A 10.C 11.D 12.A 13.A 14.B 15.C 16.C 17.B 18.C 19.C 20. C
*August 1, 2006*