Sunday

December 4, 2016
Total # Posts: 1,286

**Math: Derivatives**

Use the shortcut rules to mentally calculate the derivative of the given function f(x) = −x + (3/x) + 1 After deriving it, I got -1+(0/1)+0= -1 But this answer is wrong, and I don't know why. Thank You

*April 8, 2012*

**Calc 1 (Optomization)**

A rectangular storage container with an open top is to have a volume of k cubic meters. The length of its base is twice its width. The material for the base costs $6 per square meters and the material for the sides costs $10 per square meter. Find the dimensions of the ...

*April 6, 2012*

**math**

There are 15 students in Marcelo chess club. There are 2 times as many boys as girls . Howm many girls are in the club?

*April 5, 2012*

**AP Chem**

Sulfuric acid (H2SO4) is a very strong diprotic acid. If 0.054 moles of sulfuric acid is mixed with water to make 667 milliliter of solution,what is the molarity of H+? Answer in units of M doing mole/liter doesn't work

*April 1, 2012*

**Math**

Find the equation of the tangent to the graph at the indicated point. f(x) = x^2 − 1; a = 3 and f(x) = x^2 − 8x; a = −9 whats the difference between 1 and 8x. What formula do I use and how should i solve both of these problems? Thank you

*March 31, 2012*

**physics**

A vertical tube with a tap at the base is filled with water, and a tuning fork vibrates over its mouth. As the water level is lowered in the tube, resonance is heard when the water level has dropped 18 cm, and again after 54 cm of distance exists from the water to the top of ...

*March 28, 2012*

**math**

would you divide 65 by 3 to find the lenght

*March 28, 2012*

**math**

a bicycle wheel has a circumfrence of 65in what can i do to find the length of one spoke

*March 28, 2012*

**Physics **

Tom the train and Dan are involved in an elastic collision. A 2.5 kg Tom is, at rest but is approached head-on by a 5.0 kg Dan moving at 0.60 m/s. The force-separation graph for the ensuing collision is given: the picture of the graph is found here: i54.tinypic (dot) com/...

*March 25, 2012*

**statistics**

Show the work for 750 x 23%, how do you do it?

*March 19, 2012*

**physics**

The system shown below consists of a block of mass M = 4.4 kg resting on a frictionless horizontal ledge. This block is attached to a string that passes over a pulley, and the other end of the string is attached to a hanging block of mass m = 1.9 kg. The pulley is a uniform ...

*March 16, 2012*

**Computer Science (java1)**

can someone please tell me the equation for compshift? double Angle = 45.0; double AngleRadians; double ComptonShift ; //calculations AngleRadians = Math.toRadians(Angle); ComptonShift = Helpppp here

*March 14, 2012*

**chemistry**

an ammonia molecule, NH3 travels at about 658 m/s at room temperature. How fast would a molecule of hydrogen sulfide, H2S travel under the same conditions?

*March 13, 2012*

**Math**

6ab + 4bc - 3bc + bc

*March 12, 2012*

**English 11**

Roscoe is correct

*March 12, 2012*

**Math: Limits**

Estimate the limit numerically. lim as x→(approaches to)5 6e^(x − 5) How do I solve it? I don't plug in the numbers do I? Then how do I do this as well? What should I do to solve lim x→(approaches to)− infinity 6xe^(7x) Do I disregard the other ...

*March 10, 2012*

**english 11**

Connexus answers d,b,d,c,d

*March 9, 2012*

**critical thinking**

Identify mission-related environmental risks?

*March 8, 2012*

**physics**

You throw a 134 g ball straight up to a height of 43.0 m. (a) Assume that the displacement of your hand is 0.70 m as you throw the ball straight up. How long is the ball is in your hand? (b) Calculate the average force exerted by your hand while you are throwing it.

*March 7, 2012*

**physics**

A physics student playing with an air hockey table (a frictionless surface) finds that if she gives the puck a velocity of 5.30 m/s along the length (2.80 m) of the table at one end, by the time it has reached the other end the puck has drifted 5.19 cm to the right but still ...

*March 4, 2012*

**math**

a flagpole cast a shadow that is 26ft long. At the same time, a yardstick cast a shadow that is 4ft long. How tall is the flagpole

*March 4, 2012*

**Math**

Real rate = 11-3.8 = 7.2% 1,500,000/(1+0.072)^40= 92960.80 To check this is correct you can do: 92960.80*(1+0.072)^40= 1,500,000

*February 29, 2012*

**Pre-Cal**

If the interest on a long-term Canadian(3/8%) investment is compounded continuously, how long will it take the value of an investment to triple? (Give the answer correct to two decimal places.) Got 19 years--its wrong, can't find reason. Thanks.

*February 29, 2012*

**college**

Solve the problem. Round to the nearest cent. Joan wants to have $250,000 when she retires in 27 years. How much should she invest annually in her annuity to do this if the interest is 7% compounded annually? A) $1861.10 B) $3356.43 C) $2672.15 D) $937.86

*February 27, 2012*

**physics**

you get this one yet? can't figure it out either..

*February 26, 2012*

**Physics **

If a bicyclist of mass 68.0 kg (including the bicycle) can coast down a 7.00° hill at a steady speed of 6.20 km/h because of air resistance, how much force must be applied to climb the hill at the same speed (and the same air resistance)?

*February 21, 2012*

**physics**

2nd part...(ma)(v0 + 1/2at) a = 9.8 Havent figured out first part either

*February 20, 2012*

**physics**

A 61.7 kg person jumps from rest off a 2.98 m-high tower straight down into the water. Neglect air resistance during the descent. She comes to rest 1.19 m under the surface of the water. Determine the magnitude of the average force that the water exerts on the diver. This ...

*February 20, 2012*

**algebra**

never mind i think i figured it out.I got the answer 17.and right now, i think it is correct so adios!!!!

*February 19, 2012*

**algebra**

please

*February 19, 2012*

**algebra**

i really need help with this!!

*February 19, 2012*

**algebra**

anybody there????

*February 19, 2012*

**algebra**

yoo hoo!!!!!!?????

*February 19, 2012*

**algebra**

what number is the simplified expression equal to, 13 - 7 + (2 x 5 - 1) divided by 3 + 7. can someone help me with this???

*February 19, 2012*

**algebra**

thanks dude.so the answer or solution would be 16???

*February 19, 2012*

**algebra**

what number is equivalent to this expression,(4 x 9 - 13) - 15 divided by 5 x 2 - 1??? can someone help me with this.

*February 19, 2012*

**Algebra**

Gymnast Clothing manufactures expensive soccer cleats for sale to college bookstores in runs of up to 500. Its cost (in dollars) for a run of x pairs of cleats is C(x) = 3000 + 9x + 0.1x2 (0 ≤ x ≤ 500). Gymnast Clothing sells the cleats at $130 per pair. Find the ...

*February 19, 2012*

**Short Stories**

1.In "Paul's Case," why does Paul go to work early? A. He didn't want to get caught skipping school. B. He liked looking at the pictures in the art gallery. C. He wanted to wrestle with the other boys. D. He didn't want to lose his job. (B) ? 2. Which one...

*February 18, 2012*

**english**

Can't*

*February 17, 2012*

**english**

I've gotten my books, And have done all my work, this is my last section and I don't know these stories, I can seem to find them in any of my books.

*February 17, 2012*

**english**

Well as you can see its not all 1-20 the ones I left out were the ones I know, I'm having some trouble with these..

*February 17, 2012*

**english**

1.In "Paul's Case," why does Paul go to work early? A. He didn't want to get caught skipping school. B. He liked looking at the pictures in the art gallery. C. He wanted to wrestle with the other boys. D. He didn't want to lose his job. 2. Which one of ...

*February 17, 2012*

**us history**

The Socialist party a.) stood at its pinnacle in the early 1900's. b.) elected 33 candidates as mayor in the early 1900's. c.) elected two socialists to Congress in the early 1900's. d.) All of the above. I say it is d.) all of the above, am I right?

*February 15, 2012*

**chemistry/help**

1) Oxygen and boron are in the same period . When they form a compound----- is written first.Phosphorus and arsenic are the same group. When they form a compound------is written first. A) oxygen/phosphorus B)oxygen/arsenic C)boron/phosphorus D)boron/arsenic answer is D 2) The...

*February 12, 2012*

**chemistry/check please**

1) Oxygen and boron are in the same period . When they form a compound----- is written first.Phosphorus and arsenic are the same group. When they form a compound------is written first. A) oxygen/phosphorus B)oxygen/arsenic C)boron/phosphorus D)boron/arsenic answer is D 2) The...

*February 12, 2012*

**Chemistry**

What would happen if MnO2 was mixed with KBrO3 ND 9 M sulfuric acid?

*February 10, 2012*

**math**

If every 6th customer gets a coupon for free fruit snacks and every 9th customer gets a coupon for free fruit juice which customer will be the first to get both free fruit and free juice?

*February 7, 2012*

**physics**

Can't figure this one out myself either...gotten any further into it? Have tried multiple ways with no success

*February 6, 2012*

**Physics**

.417s

*February 5, 2012*

**math**

Suppose a bag of marbles has 4 green, 2 red, 5 yellow, 1 brown, and 7 blue marbles. What is the probability of picking a green marble, replacing it, and then picking a brown marble?

*January 31, 2012*

**world history**

1)Who became Da vinci,s rival in Florence? -Michelangelo 2)What was the mistake Leornardo made with his work the last Supper? -leornardo chose to sit Judas in with the rest of the disciples 3)What was the name Da Vinci gave to his appertentice? Can you check my answer? And ...

*January 31, 2012*

**Probability **

4,915 people were surveyed about their recent purchases. 1,027 of those people surveyed bought a lawn mower within the last year, 918 bought a snow blower within the last year, and 3,387 didn’t buy either of the two. a) How many people bought a lawn mower and a snow ...

*January 30, 2012*

**Algebra II**

1. A sound has an intensity of 5.92 „e 1025W/m2.What is the loudness of the sound in decibels? Use . 2. Suppose you decrease the intensity of a sound by 45%. By how many decibels would the loudness be decreased?

*January 25, 2012*

**social studies**

mummy-shaped figures that worked in the after life,s fields for the mummy

*January 17, 2012*

**physics**

A +30 µC charge is placed 44 cm from an identical +30 µC charge. How much work would be required to move a +0.69 µC test charge from a point midway between them to a point 14 cm closer to either of the charges?

*January 17, 2012*

**math**

find the average of 26, 42, 57, 49, and 16.

*January 17, 2012*

**Earth Science**

True or false? ------------------------- Although there is scientific evidence and many scientific theories about the origin of the universe, how it all happened remains a question. Which statement is true? ------------------------- The perfect cosmological principle is the ...

*January 17, 2012*

**spanish/check please**

Describe a typical day in your life from beginning to end eight different( (reflexive verbs).give time you do each of those activities as well. 1-Yo me levanto a las seis de la manana. 2-Entonces me lavo la cara a las seis y cuarto. 3-Depues de que me pongo la ropa a las seis...

*January 16, 2012*

**auditing**

I have been asked "Determining whether amounts are in conformity with GAAP addresses the proper measurements of assets, liabilities, revenues, and expenses which includes all of the following except: a. the reasonableness of management's accounting principles. b. ...

*December 19, 2011*

**Englidh 7 - Journal Entry (plz read)**

This is great!! :)

*December 15, 2011*

**Math**

I'm not 100 percent sure but I believe it goes like this . The coach could have runners A B C run. He could also have runners A B D run it . Yet he could have runners C A D run . He also may have Runners B D C run.

*December 15, 2011*

**MATH**

THANKS FOR THE ANSWER BUT I DON'T KNOW HOW TO WRITE THE PROBLEM TO ARRIVE TO THAT ANSWER

*December 14, 2011*

**Spanish 1**

ESTA' REMEMBER THE ACCENT OVER THE "A"

*December 14, 2011*

**Spanish 1**

DONDE ESTA LA SILLA WHERE IS THE CHAIR?

*December 14, 2011*

**MATH**

SANTA WAS NUMBERING THE PAGES OF HIS ORDER BOOK. HE WROTE 690 DIGITS. HOW MANY PAGES WERE IN HIS ORDER BOOK?

*December 14, 2011*

**auditing**

I am right to believe that the rights and obligation assertion applies only to the balance sheet items only? Because my homework assignment asks," The rights and obligations assertion applies to: a. current liability items only. b. revenue and expense items only. c. both ...

*December 14, 2011*

**linear equations**

Write the equation of a line in slope-intercept form that is perpendicular to the line and passes through the point (-9, 4).

*December 14, 2011*

**trig**

Sin would be 1/2 +360n?

*December 13, 2011*

**trig**

Find the exact values of the inverse function arcsin 1/2

*December 13, 2011*

**Economics**

what is an economist view on this statement "It is not from the benevolence of the butcher, the brewer, or the baker that we expect our dinner, but from their regard to their own interest."

*December 13, 2011*

**Auditing**

I need help with this. I was presented with this question: Analytical procedures show that inventory turnover decreased from 31–34 days to 27 days, and gross margins declined to the lowest level in five years. What might this indicate about the risk of misstatement with ...

*December 11, 2011*

**MATH**

HARRIET BOUGHT CHRISTMAS CARDS. SHE BOUGHT 1 BOX WITH 15 CARDS FOR $18.00, 1 BOX WITH 12 CARDS FOR 20.00, AND 2 BOXES WITH 10 CARDS FOR $8.00 EACH. WHAT WAS THE AVERAGE PRICE SHE PAID PER CARD?

*December 7, 2011*

**interm. algebra**

3e^-5x=48 solve

*December 4, 2011*

**Math**

Sam and Nora leave their business office at the same time. Sam drives north at 53 km/h, Nora drives south at 47 km/h. How long until they are 50 km apart?

*December 2, 2011*

**government**

Why does the electoral college not allow citizens living in U.S. territories to vote, as it is the only place in the universe (astronauts have voted) that U.S. citizens can't vote.

*December 1, 2011*

**math**

if 16 tablespoons = 1 cup how many tablespoons 3/4 of a cup

*November 30, 2011*

**USI**

Write limits of integration for the integral \int_W f(x,y,z)\,dV, where W is the quarter cylinder shown, if the length of the cylinder is 1 and its radius is 1.

*November 29, 2011*

**algebra**

add (5y^2-7y)+(3y-y^2)

*November 21, 2011*

**geometry**

|2x+5| -1 < 6

*November 14, 2011*

**math**

How can estimating help you add two-digit numbers?

*November 7, 2011*

**physics**

A 220-kg crate rests on a surface that is inclined above the horizontal at an angle of 19.4°. A horizontal force (magnitude = 525 N and parallel to the ground, not the incline) is required to start the crate moving down the incline. What is the coefficient of static ...

*November 7, 2011*

**Physics**

A rocket of mass 4.45E+5 kg is in flight. Its thrust is directed at an angle of 51.1° above the horizontal and has a magnitude of 7.64E+6 N. Calculate the magnitude (enter first) and direction of the rocket's acceleration. Give the direction as an angle above the ...

*November 4, 2011*

**investing**

Why is there a gain or loss in a pension expense calculation? I am more confused about this every time I read about this topic. Can somebody explain this to me? I have researched and read and still do not understand why.

*November 1, 2011*

**Chemistry**

calculate the frequency of an xray having a wavelength of 3.5*10to the negative seven m. (meters).

*October 31, 2011*

**physics**

A dynamics cart carrying a black 10.0 cm strip accelerates uniformly and passes through two photogates. The time for the strip through the first photogate, time in Gate1, is 0.250 s and through the second photogate, time in Gate2, is 0.180 s. (1) Determine the average velocity...

*October 30, 2011*

**physics**

A woman stands on a scale in a moving elevator. Her mass is 57.0 kg, and the combined mass of the elevator and scale is an additional 811 kg. Starting from rest, the elevator accelerates upward. During the acceleration, the hoisting cable applies a force of 9391 N. What does ...

*October 28, 2011*

**physics**

A 71.0 kg person steps on a scale in an elevator. The scale reads 722 N. What is the magnitude of the acceleration of the elevator?

*October 28, 2011*

**physics**

A 31.0 kg object slides down a slope which is inclined at an angle of 20.0o to the horizontal. What is the normal force exerted by the slope?

*October 28, 2011*

**physics**

A rocket of mass 4.45E+5 kg is in flight. Its thrust is directed at an angle of 51.1° above the horizontal and has a magnitude of 7.64E+6 N. Calculate the magnitude (enter first) and direction of the rocket's acceleration. Give the direction as an angle above the ...

*October 28, 2011*

**Chemistry**

If 0.120 moles of water are produced in the reaction H+(aq)+OH-(aq)=H2O deltaH=-56.2kj/mol what is qrxn

*October 23, 2011*

**physics**

The highest barrier that a projectile can clear is 15.8 m, when the projectile is launched at an angle of 13.4° above the horizontal. What is the projectile's launch speed?

*October 22, 2011*

**physics**

An Olympic basketball player shoots towards a basket that is 5.64 m horizontally from her and 3.05 m above the floor. The ball leaves her hand 1.71 m above the floor at an angle of 41.0o above the horizontal. What initial speed should she give the ball so that it reaches the ...

*October 22, 2011*

**math**

john bought a bag, pai oh shoes ad a watch for $160 altogethe. the bag cost $15 more than the pair of shoes and the watch cost $20 less than the bag. What was the cost of the bag?

*October 22, 2011*

**math**

its better to round to the hundreds because if you round to the thousands, it would be really far away from the real answer. for example, if you round 7,127 to the thousands place, it would be 7,000. but if you round it to the hundreds place, it would be 7,100 which is closer ...

*October 18, 2011*

**english**

cool :P by the way, i was just curious. LOL

*October 18, 2011*

**english**

are you a teacher or a random student with that name?

*October 18, 2011*

**english**

thanks that really helped :D <3

*October 18, 2011*

**english**

what are dependent and independent clauses?

*October 18, 2011*

**Social Studes**

i will answer the first part for you, a backcountry is a sparsely populated rural region remote from a settled area.

*October 18, 2011*