Wednesday

April 16, 2014

April 16, 2014

Total # Posts: 256

**CHEMISTRY HELP !!!! **

NH4CL , ZNCL2 , KAL(SO4)2 FIND THE FOLLOWING NET IONIC EQUATION FOR HYDROLYSIS EXPRESSION FOR EQUILIBRIUM CONSTANT (KA OR KB) VALUE THANK YOU SO MUCH!!!

**Calculus Help Please!!!**

Find the equation in slope intercept form of the tangent line and the normal line to the curve x^2+4xy+y^2=13 at the point.(2,1). show steps please!!! thank you!

**Calculus Help Please!!!**

I've got dy/dx= x^2/y^2 but couldn't find second derivative. thanks!

**Calculus Help Please!!!**

If x^3 - y^3 =3 , use only implicit diff. to find d^2y/dx^2 . Express your answer in terms of x and y only and write is as a proper fraction that is completely simplified as much as possible.

**Calculus Help Please!!!**

Thank you so much!!!

**Calculus Help Please!!!**

Verify the given linear approximation at a = 0. Then determine the values of x for which the linear approximation is accurate to within 0.1. (Enter your answer using interval notation. Round your answers to three decimal places.) ln(1 + x) ≈ x Y1= I ln(1+x)-x I Y2= 0.1 f...

**Calculus Help Please!!!**

Find the absolute maximum and absolute minimum values of f on the given interval. f(t) = (t square root of (64 − t^2)) ,[−1,8]

**math**

Sorry. I think I was reading too fast and missed that. Thank you.

**math**

I need to convert this correct. I think that's my biggest issue. Since the diameter is in inches and the distance is in miles, wouldn't I have to convert the miles into inches?

**math**

Dana rode her bicycle 600 miles one summer before she had to replace the tire on her front wheel. The diameter of the front wheel is 24 inches. What is the best estimate of the number of revolutions made by the tire before it had to be replaced?

**Calculus Help Please!!!**

In a murder investigation, the temperature of the corpse was 32.5 C at 1:30pm and 30.3 C an hour later. Normal body temperature is 37.0 C and the temperature of the surrounding was 20.0 C. When did the murder take place? PLEASE SHOW STEP BY STEP

**math**

A water heater has a diameter of 18 inches. It sits in a drain pan that has a diameter of 22 inches and a height of 2 inches, as modeled in the diagram below. Water that leaks out of the water heater sits in the drain pan. Which of the following is closest to the maximum amoun...

**Calculus Help and Check **

Find dy/dx by implicit differentiation. x^5(x + y) = y^2(9x − y) this is what i've got so far but I dont think it is the right answer. y'= 9y^2-6x^5-5x^3y/x^5+9y^2-18xy

**Science**

Intrinsic control of heartbeat rate involves what mechanism(s)? a) The AV node initiates heartbeat although the SA node can generate a slower beat rate. b) The atrioventricular bundle initiates signals that travel to the Purkinje fibers. c) The SA node initiates heartbeat alth...

**Physics **

Two spheres with masses of 5.00 g and 10. kg respectively are .500 m apart. calculate the force of attraction between them.

**Medical Billing and Coding**

Had to develop a paragraph using clear, varied sentences containing concrete words and transitions or connectives to create a logical flow. Need assistance in the following paragraph that describes on particular experience I had that inspired you or guided you to chose that ty...

**Math**

(2-4i)-(-4+i)=

**finance**

can someone help me with this problem for this problem you will use 0.02/365 for your interest. You deposit $1000 at 2% for 20 years, compounded daily.

**finance**

You deposit $1000 at 2% for 20 years, compounded annually. What's the future value?

**finance**

You deposit $1000 at 2% for 20 years, compounded annually. What's the future value?

**math**

i am a 2 digit decimal , the sum of my digit is 12. if you divide me by a certain number the quotient is 37. who am i?

**pre cal **

Solve G(x) for the given domain. G(x) = 3x 2 - 2x - 1 G(6) =

**Physics**

Which of the following is the correct relationship between the electric field strength and the potential difference?

**Algebra**

Solve for x. Round to the nearest hundredth. ln(x) = -1.8 x =

**math**

Find the general solution of cos2x + 3 sin x =2

**math**

show that 1-sin x/cosx + cosx/1-sin x = 2 sec x

**,math**

show that sec theta(cosec theta) - cot theta = tan theta

**Algebra**

Write the logarithm in expanded form. log2(y^5)

**Algebra**

Solve for x. Round to the nearest hundredth. ln x = − 4/9 x =

**Algebra**

Evaluate the following function at the indicated values. H(x) = 2x (a) H(-3) = (b) H(0) = (c) H(5) =

**Algebra**

Given f(x)=x^2 + x + 4 and h(x)= 3x +2, evaluate the composite function. f [h(x)]

**Algebra**

Given h(x)= 2x + 2 and f(x)=1/2 x + 4, evaluate the composite function. h[f(x)]

**Algebra**

Given f(x) = 2x − 1 and g(x) = 4x − 4, evaluate the composite function. g[f(x)]

**Algebra**

Given f(x)=2x^2 + 9x − 7and g(x)=2x −6, find the following. (If an answer is undefined, enter UNDEFINED.) f(−2) − g(−2)

**Algebra**

Given f(x)= 2x^2 – 1 and g(x) = –2x + 1, find the following. f(3) − g(3)

**English Composition**

I know that mood and tone are different, but is mood considered an element of literature?

**chemistry**

how much heat is required to vaporize 343g of liquid ethanol at its boiling point?

**science**

In the laboratory small zircon crystals were separated from granite (K). Isotopic analysis of these zircon crystals gives a 207Pb/235U ratio of 0.45. the half-life of 235U (7.04 × 108 years), estimate the age of the granite in Ma to two significant figures

**Chemistry**

You are using concentrated hydrochloric acid solution (12.0 M)to make 445.0 ml of a 5.85 M solution. Calculate the number of milliliters of concentrated HCl required to make the solution.

**math**

Correct the right hand side of the following expressions. 5+ x = 5 + X 2 6 2 + 6 6x + 5 = x + 5 6 1 1 1 y + c = y + c

**Math**

Jake ate seven times more jelly beans as Sam. Together they ate 128 jelly beans. How many jelly beans did each person eat?

**Finance**

An investment pays 9 percent interest compounded semi-annually. What is the effective annual interest rate?

**cccs**

f/-11 < 9

**physics**

an elevator motor provides 45 W of power while lifting a 2000 kg elevator 35 m. if the elevator contains six passengers of the same mass and it takes 20.0 to accomplish this task, determine pass of each passenger.

**american government**

Which of the following is characteristic of a capitalist economic system? a. free enterprise b.self-reliance c.private property d.individualism e.all of the answers are correct

**language arts**

“In the snow” is repeated three times in “Scott’s Goodbye.” What meaning might the writer have hoped to convey by repeating this phrase?

**Calculus!**

A 16 ft. ladder leans against a wall, with the top being 12 ft. from the wall when time t=0. The top is sliding down at a constant rate of 4 ft./second. Given that the top of the ladder touches the ground at 3 seconds, what is the velocity of the bottom of the ladder when t=3?

**MATH,statistics**

At a recent scotch-tasting party, 20 faculty members and their (opposite sex) spouses were guzzling it back pretty well. One person quite correctly noticed that the women seemed to be drinking more than the men. If the mean number of drinks had by the men was 5, and that for t...

**statistics**

If other factors are held constant, how does increasing the number of scores in each sample affect the value of the independent measures t statistic and the likelihood of rejecting the null hypothesis?

**Physics**

if you were on a 22.7 degree slope and an avalanche started 425 m up the slope, how much time would you have to get out of the way, there is no friction.

**physics**

A box of books weighing 324 N is shoved across the floor by a force of 527 N exerted downward at an angle of 35 below the hori- zontal. The acceleration of gravity is 9.81 m/s2 . If μk between the box and the floor is 0.59, how long does it take to move the box 4.35 ...

**Math,statistics**

The sum of 16 reciprocals (1 over the number) is found to equal 4. What is the harmonic mean of the original (i.e., non-reciprocated) scores?

**Math,statistics**

The sum of 16 reciprocals (1 over the number) is found to equal 4. What is the harmonic mean of the original (i.e., non-reciprocated) scores?

**Physics**

On a playground slide, a child has potential energy that decreases by 1000 \rm J while her kinetic energy increases by 900 \rm J. What other form of energy is involved, and how much?

**Math**

The perimeter of a square is f feet. How long in yards is each side of the square?

**Math**

A number that can be divided by 2 three times in a row with no remainder, has 5 as a factor and is greater than 40

**Psychology**

Where are selfish impulses? Examples of social conscience?

**physics**

In the design of a supermarket, there are to be several ramps connecting different parts of the store. Customers will have to push grocery carts up the ramps. A grocery cart has a mass of 30kg. The coefficient of friction is .10. Assume that the shoppers will push the cart par...

**Math**

x is to 6 as 0.8 is to 1.5 How do I write a proportion with that? (proportion such as eg. 14/105=x/315) is it x/6=0.8/1.5 or is it x/0.8=6/1.5 Urgent!!

**7th G-Math**

a is the answer -9/-3 is 3 any negative divided by another negative is always a positive the -9+(-3) so it is -9-3 -9-3=-12

**math**

the value is 46 any thing in side the absolute values sign (| |) turns postive

**math**

y – (–19) = 25 negative and negative is positive y+19=25 now you want to get y all alone and anything flipped to the other side of the equals sign changes. so positive numbers turn negative as negative turn positive y=25-19 y=6 thats your answer!

**5th grade math**

0.33 is more. The less numbers a decimal has the more it is and then and the smaller the decimal, the larger.

**6th grade math**

13/16-1/4 you need to change 4 into 16. 4*4 is 16 so now it is 13/16-4/16 13-4=9 so it is 9/16

**statistics**

Breast feeding sometimes results in a temporary loss of bone mass as calcium is depleted in the mother's body to provide for milk production. An investigation gave the following data on total body bone mineral content (g) for a sample of mothers both during breast feeding ...

**6th Geography**

Correct

**Algebra**

x2 - 5x + 5 = 0

**statistics**

The ages of commercial aircraft are normally distributed with a mean of 13.0 years and a standard deviation of 7.5 years what percentage of individual aircraft have ages greater than 15 years assume that a random sample of 49 aircraft is selected and the mean age of the sample...

**math**

The demand function for a certain commodity is approximated by: p = 100e-q/2where "q" is the number of units demanded at a price of "p" dollars per unit. If there is no demand for the product, what will its price be(in dollars)?

**math**

Find the solution of the given system by the method of addition that was used in Examples 4 and 5. If there is no solution or infinitely many solutions, state so. Put the value for x in the blank. 2x - 3y = 1; x + 2y = 4

**Chemistry**

Exactly 100 mL of 0.14 M nitrous acid (HNO2) are titrated with a 0.14 M NaOH solution. Calculate the pH for the following. (a) the initial solution (b) the point at which 80 mL of the base has been added (c) the equivalence point (d) the point at which 105 mL of the base has b...

**Chemistry**

Calculate whether or not a precipitate will form if 1.30 mL of 0.80 M NH3 are added to 2.2 L of 1.0 10-3 M FeSO4. Calculate Q.

**math**

solve and check each of the following quadratic equation (1)x^2+16x=36 (2)x^2=10x-16 (3)3x=x^2-4

**help math**

solve each of the following quadratic equation (1)x^2=5x+6 (2)x^2+9x=10

**help in math**

solve and check each of the following quadratic equation (1) x^2=6x (2) x^2=3x (3)x^2=17x (4) x^2=5x+6 (5) x^2+9x=10

**quadratic equation**

solve and check each of the following quadratic equation (1)x^-9x=0 (2)x^+8x=0 (3)x^=6x (4)x^=-3x

**quadriatic equation**

solve and check each of the following quadratic equation (1)x^+x-6=0 (2)x^+8x+15=0 (3)x^+2x+1=0 (4)x^-3x-4=0 (5)x^-4x-32=0

**math**

wats the positive root of the equation x^-3x=10?

**chemistry**

how many grams of hydrogen are produced if you have 120 grams of sodium? 2Na+2H2O->2NaOH+H2

**Algebra 1**

not enough mathematical equation to answer your question but u can solve it by using a graph.....

**quadratic equation**

what's the positive root of the following equation x(square)=7x+8

**solving algebraic equation **

a movie theater charges $9 for an adults ticket and $5.00 for a child ticket. on a recent night the sale of child's tickets was two times the sale of an adults tickets. if the total amount collected for ticket sales was not more than $3800 what is the greatest number of ad...

**solving algebraic equation **

For college orientation week,Mike sold 200 shirts.sweat shirts were priced at $50.00 each ant t-shirts at $20.00 each Mike recieve a total of $6250.00 for the shirts. How many type of shirt dud Mike sell for college orientation week ?please help and show a equation to solve

**algebraic equation and inaqualities**

in a triangle XYZ,the measure of angle Y is 40 more than the measure of angle X.the measure of angle Z is 10 less than three times the measure of angle X.find the measure of angle X

**algebra**

the sum of two adjacent angle is 80°the larger angle is 8°less than 3 tines the smaller find the number of degrees in each angle

**algebra verbal linear equation**

Allison has a square root flower garden and Lauren has a rectangular flower garden the width of the rectangular garden is 2 yards less than a side of the squaare garden and the length of the rectangular garden is 5 yards more than a side of the square garden if the sum of the ...

**maths **

Christopher has cut three pieces of string to three kites.two pieces are equal length. rhw third pieces is one half of the lenght of each of the others. he cut out the three pieces from a roll of string 70 meters long without any String left over.Find the number of meters of i...

**verbal linear equations **

a taxi costs $2.75 for the first quarter of a mile and $0.85 for each subsequent quarter mile.A ride that cost $23.15 is how many miles longer than a ride that costs $17.20?(please i don't want example show me how u work it out )

**Physics**

here's the first part: deltaV=4.67μC/m2*(d/8.85E-12) and it should be somewhere over 1000 volts. good luck with the second part, I still don't know it.

**algebra**

3a+5b=4 4a+3b=2 find a and b please

**algebra**

find x and y 5x-3y=-4 3x+2y=9

**indruction to business**

strategy to displease a customer

**High Point **

a sign is in the shape of rhombus with a 60 degree angle and sides of 9cm long. Find its are to nearest tenth?

**Chemistry :/**

A 10.231-g sample of window cleaner containing ammonia was diluted with 39.466 mL of 0.1063 M HCl to reach the bromocresol green end point. Find the weight percent of NH3 (FM 17.031) in the cleaner.

**History **

what were the roman laws called that applied to all citizens in the roman empire

**Math--Please Help!!**

Auto parts dept. sends out a mean of 6.3 special orders daily. What is the probability that, for any day, the number of special orders sent out will be at least 4?

**physics**

A 2.5 kg mass weighs 23.75 N on the surface of a planet similar to Earth. The radius of this planet is roughly 7.7 × 10 6 m.Calculate the mass of of this planet. The value of the universal gravitational constant is 6.67259 × 10−11N · m2/kg2

**physics**

In introductory physics laboratories, a typical Cavendish balance for measuring the gravitational constant G uses lead spheres of masses 1.79 kg and 16.9 g whose centers are separated by 5.49 cm. Calculate the gravitational force between these spheres, treating each as a point...

**physics**

A satellite moves in a circular orbit around the Earth at a speed of 6.1 km/s. Determine the satellite’s altitude above the surface of the Earth. Assume the Earth is a homogeneous sphere of radius 6370 km and mass 5.98 × 10 24 kg. The value of the universal gravitat...

**physics**

A 2.5 kg mass weighs 23.75 N on the surface of a planet similar to Earth. The radius of this planet is roughly 7.7 × 10^6 m. Calculate the mass of of this planet. The value of the universal gravitational constant is 6.67259 × 10^−11N · m2/kg2. Answer i...