Sunday

July 5, 2015

July 5, 2015

Total # Posts: 161

**Economics**

Elesha babysits on the weekends for extra money. Suppose that three neighbors with children are interested in paying Elesha to babysit their children. In particular, Dr. and Mrs. Brown would be willing to pay $30 to have Elesha babysit their children, Mrs. Smith would be ...
*April 25, 2015*

**math**

Two investments totaling $23,500 produce an annual income of $795. One investment yields 2% per year, while the other yields 7% per year. How much is invested at each rate?
*April 20, 2015*

**Economics**

Two firms produce the same good and compete against each other in a Cournot market. The market demand for their product is P = 204 - 4Q, and each firm has a constant marginal cost of $12 per unit. MR1 = 204 - 8q1 - 4q2. Let q1 be the output produced by firm i, where i = 1,2. 1...
*April 11, 2015*

**Math**

Given an iterated map, ie. x_n+1 = 3* x_n / (x_n +1), how do we find all of its fixed points?
*March 31, 2015*

**Genetics**

A pepper plant is heterozygous for a mutant allele of the gene encoding the CaSGR enzyme (one allele is wild type and the other is mutant). The mutant allele differs from the wild type one in that it lacks a large part of the promoter sequence. Predict the following & briefly ...
*February 22, 2015*

**biology**

A pepper plant is heterozygous for a mutant allele of the gene encoding the CaSGR enzyme (one allele is wild type and the other is mutant). The mutant allele differs from the wild type one in that it lacks a large part of the promoter sequence. Predict the following & briefly ...
*February 22, 2015*

**Calculus**

Find the volume of the solid obtained by rotating the region bounded by y=8x+24, y=0 about the y-axis.
*February 18, 2015*

**Math**

On the moon the acceleration due to gravity is 5 ft/sec2. An astronaut jumps into the air with an initial upward velocity of 8 ft/sec. How high does she/he go? How long is the astronaut off the ground?
*February 10, 2015*

**chemistry**

If ∆G˚= -190.60 kJ of the reaction H2+Cl2 <--> 2HCl , what is the ∆G at -10.5˚C of the system if the pressure of H2=3.2atm and the pressure of Cl2=9.7atm and the pressure of HCl= 7.65atm ?
*February 9, 2015*

**Chemistry**

For the following reaction 2NO2 -> 2NO +O2 is second order reaction. If the initial concentration of NO2 is 0.098M and the initial rate of disappearance is 2.72e-3 M/sec , what is the value of the rate constant?
*February 9, 2015*

**Chemistry**

The following reaction has ΔG° = -190.60 kJ: H2(g) + Cl2(g) ⇌ 2 HCl (g) All three gases are placed in a sealed vessel. What is the ΔG at -10.5 °C of the system if the pressure of H2 is 3.2 atm, the pressure of Cl2 is 9.7 atm, and the pressure of HCl is ...
*February 9, 2015*

**Math**

A stone was dropped off a cliff and hit the ground with a speed of 120 ft/s. Using the fact that acceleration due to gravity is −32ft/s2, what is the height (in feet) of the cliff?
*February 9, 2015*

**Chemistry**

The pH of a 25.0 mL sample of a buffer changed by one unit when 4.19 mL of 0.24 M HCl was added to it. What is the acid buffer capacity of this buffer?
*February 5, 2015*

**LA**

What kind of word does the adverb in the previous question modify? (1 point) another adverb an adjective a noun a verb Noun right?
*January 26, 2015*

**LA**

Which word in the following sentence is an adverb? Teresa smiled brightly as she and her younger brother looked for shiny shells on the sandy beach. (1 point) smiled brightly shiny sandy don't know adverbs well but I think it is sandy
*January 26, 2015*

**algebra**

Dilbert needs to mix a 10% alcohol solution with a 30% alcohol solution to create 100 millileters of a 16% solution. How many millileters of each solution must Dilbert use?
*December 19, 2014*

**Language Art Novel**

Yes with my mom
*December 3, 2014*

**Language Art Novel**

Is it C
*December 3, 2014*

**Language Art Novel**

Which of the following statements most accurately reflects the political climate in Boston in 1773? a. Most people in Boston were Tories who remained loyal to England and believed the Whigs were needlessly stirring up trouble. b. The Whigs were a vocal majority that ran the ...
*December 3, 2014*

**Algebra**

Is (5v+2) + 14x = 5v + (2+14x) an example of associative property of addition? My answer is yes
*August 13, 2014*

**Algebra**

Thank you
*August 13, 2014*

**Algebra**

r * 1 = r is an example of what kind of property of multiplication?
*August 13, 2014*

**Algebra**

thank you
*August 13, 2014*

**Algebra**

How many square feet of grass are there on a trapezoidal field with a height of 75 feet and bases of 125 feet and 81 feet. I know the formula is A = h( b + b) / 2 A = 75 ( 125 + 81) / 2 A = 75 ( 206 ) /2 OK, my question is do you divide the 206 by 2 and multiply times 75 or ...
*August 13, 2014*

**Earth Science**

A scientific hypothesis can become a theory if? a- the entire scientific community accepts it b- the hypothesis is tested extensively and competing hypothesis are eliminated c- there are no other competing hypothesis d- the hypothesis can be tested at least once My answer is B
*August 13, 2014*

**Algebra**

OK, my question is do you divide the 206 and multiply times 75 or multiply 75 times 206 and then divide by 2
*August 13, 2014*

**Algebra**

How many square feet of grass are there on a trapezoidal field with a height of 75 feet and bases of 125 feet and 81 feet. I know the formula is A = h( b + b) / 2 A = 75 ( 125 + 81) / 2 A = 75 ( 206 ) /2
*August 13, 2014*

**Algebra**

20 thank you Cole
*August 12, 2014*

**Algebra**

Simplify the expression 4 squared + 8 /2 My answer is 12
*August 12, 2014*

**Algebra**

Write a word phrase for the Algebraic expression 3x - 7 My answer is the difference of 3 times a number x and 7
*August 12, 2014*

**Earth Science**

what is the driving force for the movement of the lithospheric plates? a- heat from the sun b- unequal distribution of heat within Earth c- heat in the atmosphere d- unequal distribution of heat from the oceans My answer is B
*August 12, 2014*

**Algebra**

simplify 5+4 times (8-6) squared
*August 12, 2014*

**Algebra**

A pair of jeans is on sale for 25% off the regular price. Write the algebraic expression for the sale price. If the original price of the jeans was $40, evaluate the expression to find the sales price. My answer is s = p - 0.25 p; $30
*August 12, 2014*

**Algebra**

Simplify 5 squared -4 over 5 + 2
*August 12, 2014*

**Algebra**

Simplify (0.4) cubed
*August 12, 2014*

**fractions**

usually takes tom 3/4 of an hour to drive to work. one day, due to flooding of the road, it took him 1 1/2 hours longer. how long did the journey take him?
*June 12, 2014*

**math**

Having a hard time with equal and groups.. 13 into 6 groups and what is left over..
*April 28, 2014*

**Science (please check my answers)**

ya lorenze is right 9's 1
*February 5, 2014*

**Electrical Engineering**

answer please
*November 29, 2013*

**algebra**

A man tosses a penny up into the air above a 100 ft well with a velocity of 5 ft/sec. The penny leaves his hand at a height of 4 ft. How long will it take for the penny to reach the bottom of the well?
*November 25, 2013*

**TRIPLE JUNCTION SOLAR CELL - I**

please give answer to this question urgetnlyyyyyyyyyyyyyyyy
*November 23, 2013*

**Physics**

Example 1: (Rock A) is thrown against a larger stationary rock(Rock B). considering the following possibilities... 1. Rock A bounces off of Rock B 2. Rock A splits into two pieces off of Rock B 3. Rock A explodes into many pieces off of Rock B What factors are affecting the ...
*November 8, 2013*

**Math**

Use a power of ten to estimate the product 52.6 x 9
*October 15, 2013*

**Math**

Find the area shared by the cardioids r=6(1+cos(theta)) and r=6(1-cos(theta))
*June 24, 2013*

**Math**

Find the area inside the lemniscate r^2=150cos(2theta) and outside the circle r=5sqrt(3). Please I really need help.
*June 24, 2013*

**Calculus**

By recognizing each series below as a Taylor series evaluated at a particular value of x, find the sum of each convergent series. A) 1+5 + (5^2)/(2!)+(5^3)/(3!)+(5^4)/(4!)+...+ (5^k)/(k!)+...= B) 1-(2^2)/(2!)+(2^4)/(4!)-(2^6)/(6!)+...+((-1)^(k)2^(2k))/((2k)!) +...=
*June 18, 2013*

**Geometery**

I figured it out. Thanks.
*April 21, 2013*

**Geometery**

Is the long side one of the parallel sides ? YES Where did the 5 come from? Slanted top.
*April 21, 2013*

**Geometery**

Trapezoid. A = (5+4) x 11/2 = 49.5 Long side is 11 in. bottom base is 4 in Correct? Or you need more info?
*April 21, 2013*

**Geometery think I got it**

I think I figured it out. The triangle. A= 1/2 x bxh A = 1/2 x 19 x 12 = 114cm area of for Triangle. I got the 12 because the paraelel side of 10 is 22 of the rectangle. So the triangle looks like (attached to rect.) it is 12cm.
*April 21, 2013*

**Geometery**

Yes I see what your saying. The bottom of the triangle though is apart of the side of the rectangle. But just a small portion of it. I knew my triangle something was off. A = 1/2 x 10cm???x 19cm The rectangle 10cm is paraelle to 22cm.
*April 21, 2013*

**Geometery**

Sorry I added 374.5 (actual calculation of rectangle area) to 9.5 = 384cm total area of the composite figure is what I meant to type.
*April 21, 2013*

**Geometery**

Composite figure finding area. Rectangle: A=22cm x 17cm = 374 area of rectangle (Long side is 22cm, Width is 17cm.) Triangle: A = 1/2 x b x h A = 1/2 x 19cm ( no height given) A= 9.5 area of Triangle I added 323.5cm + 9.5cm = 333cm area of the composite figure. Is the the ...
*April 21, 2013*

**Geometery**

Is my answer right? Also, if not is my triangle formula wrong?
*April 21, 2013*

**Geometery**

Composite figure finding area. Is this right my answer I came out with is 323.5 cm? Rectangle: A=22cm x 17cm = 374 (Long side is 22cm, Width is 17cm.) Triangle: A = 1/2 x b x h A = 1/2 x 19cm ( no height given) So then, I added the rectangle and trinagle sum together and came...
*April 21, 2013*

**Newton's Laws**

1. An 1760 kg car is moving to the right at a constant velocity of 2.94 m/s. (a) What is the net force on the car? (b) What would be the net force on the car if it were moving to the left? 2.A freight train has a mass of 6 107 kg. If the locomotive can exert a constant pull of...
*April 8, 2013*

**reading**

Bob Pennons the cowboy. Make inferences. How to do.
*March 6, 2013*

**calculus**

Find dy/dx by implicit differentiation. x^4 + x^3y + 4y^2 = 7 x cos y + y cos x = 1
*February 23, 2013*

**math**

a bag has 57 blue and green marbles. there are 13 more blue marbles than green marbles. How many blue and green marbles are in the bag
*December 20, 2012*

**math**

girl is 6 feet tall and a pine tree next to her is 42 feet tall and casts a shadow that is 28 feet. how long is the girls shadow
*October 30, 2012*

**Math**

that answer is wrong...
*October 13, 2012*

**Precalculus**

I have a diagram that has 4 rectangular corrals joined together and a barn above it. Fencing is not needed along the back wall of the barn. The perimeter is 200 ft and the question asks... If each corral is 16 ft. long (front to back) how wide will each corral be and what will...
*October 6, 2012*

**Precalculus**

Combined area of 1680ft^2 for 4 identical rectangular corrals. Corrals are joined together and no fencing at the back wall of the barn. 200=5d+4w 1680=4dw What length will produce the maximum area? d=12 The dimensions of each corral (lxw) is 12'x35' What will be the ...
*October 6, 2012*

**Precalculus**

There are 4 rectangular corrals of identical dimensions along the back wall of an existing barn using 200 ft of fencing. The diagram has 4 rectangular corrals attached together but fencing is not needed on the back wall of the barn. The barn is above the 4 rectangular corrals...
*October 5, 2012*

**Precalculus**

The owner of a horse stable wishes to set up 4 rectangular corrals of identical dimensions along the back wall of an existing barn using 200 ft of fencing. The sides of each corral will be attached to the barn, fencing is not needed along the back wall. Find the function that ...
*October 5, 2012*

**10th Grade Math-Algebra 2**

(5*x*x*x)(4*x*y*y)
*September 12, 2012*

**physics**

What is the maximum speed (in meters/second) with which a 1300 kg car can round a turn of radius 700 m on a flat road, if the coefficent of friction between tires and road is 0.530 ?
*March 9, 2012*

**physics**

A 8.0 kg object, moving with a constant velocity of 8.0 m/s, is acted upon by a force of 14 N in the direction of the motion for 6.0 s. What is the velocity (in meters/second) of the object at the end of this time?
*March 7, 2012*

**thermochem**

A meal is 8000kJ. If all the energy is converted to heat, how much iced water with a temperature of 0 degrees must a person drink to maintain body temperature of 37 degrees? How do I solve this - using the fact that 1mL water by 1 degree is 4.2Joules? Heat gained by water = ...
*February 6, 2012*

**math**

In division, what does it mean to decide to drop, include or use the remainder? Ex: You decide to hang shelves. Each shelf needs 4 brackets. You have 23 brackets. How many shelves can you hang/ What do you do with the remainder, drop, include or use and why????
*January 8, 2012*

**math**

what do hitch hikers do when scholl lets out
*January 5, 2012*

**Math**

poop
*November 19, 2011*

**Alg 1 quadratic functions**

A baseball player hits a baseball into the outfield. The equation h= -0.005x^2 +x+3 give the path of the ball, where (h) is the height and (x) is the horizontal distance the ball travels. A. What is the equation of the axis of symmetry? It's -100 right? B. What is the Mac ...
*October 20, 2011*

**LSU**

v^2=2(9.8)(13.8)/sin(14.9) =32.43
*October 19, 2011*

**Alg 1**

I'm in the ninth grade and not the smartest community
*October 11, 2011*

**Alg 1**

I'm doing quadratic equations x^2 +bx+c =0.I'm supposed to factor each polynomial. I know how to questions like x^2 +8x +12 =0 but this one says, j^2-9jk-10k^2. I'm confused
*October 11, 2011*

**Alg 1 quadratic equations**

I'm doing quadratic equations x^2 +bx+c =0.I'm supposed to factor each polynomial. I know how to questions like x^2 +8x +12 =0 but this one says, j^2-9jk-10k^2. I'm confused
*October 11, 2011*

**Chemistry**

Consider the following unbalanced reaction. P4(s) + F2(g) PF3(g) What mass of F2 is needed to produce 212 g of PF3 if the reaction has a 84.2% yield?
*October 10, 2011*

**mesqite high school**

Is this sentence punctuated correctly? The oil from Eucalyptus trees which are native, to Australia is known for its medicinal properties
*September 30, 2011*

**geometry**

if the measure of angle 1 is 6n+1 and of angle 4 is 4n+19 what is the measure of angle 2 ?
*June 9, 2011*

**stats**

In a gallup poll of 1,038 adults, 540 saif that second hand smoke is very harmful. What is the percentage of adults who said second hand smoke is very harmful?
*May 10, 2011*

**english **

The oil from Eucalyptus trees which are native, to Australia is known for its medicinal properties
*May 9, 2011*

**History**

What were the 5 steps in Indiana becoming a state
*May 1, 2011*

**Physics**

a 1.75kg pistol lies at rest on an essentially frictionless bench. it accidentally fires and shoots a 25 gram bullet parallel to the bench. How far has the bullet moved by the time the gun has recoiled 2.60mm?
*April 25, 2011*

**Physics**

a carton of eggs sits on the horizontal seat of a car as the car rounds a 26 meter radius bend at 16.5m/s. what is the minimum coefficient of friction that must exist between the carton and the seat if the eggs are not to slip?
*April 25, 2011*

**Physics**

a 800 gram ball at the end of a cord is whirled in an almost horizontal circle of radius 1.50 meters. its tangential speed in the circle is 10 meters per second. What must be the tension in the cord? What angle does the cord make with the horizontal?
*April 25, 2011*

**math**

Hector owns science fiction novels, coming c books, and mystery novels. He has half as many science fiction novels as comic books and he has three times as many mystery novels as comic books. If he owns a totals of 54 books how many of those book are science friction novels?
*April 17, 2011*

**Physics**

a small body of mass m revolving in a horizontal circle with velocity V of a constant magnitude at the end of a cord of length L. As the body swings around its path, the cord sweeps over the surface of a cone. The cord makes an angle è with the vertical, so the radius ...
*February 16, 2011*

**Physics**

A pendulum oscillates at a frequency of 2 cycles per second. At t = 0 it is released starting at an angle of 20°C. Ignoring friction what will be the position (angle) of the pendulum at a. t = 0.25 sec b. t = 1.6 sec c. t = 5.0 sec
*February 16, 2011*

**physics**

what is the maximum acceleration equation?
*January 17, 2011*

**physics**

Consider the 45 N weight held by two cables shown below. The left-hand cable is horizon- tal. a) What is the tension in the cable slanted at an angle of 50? Answer in units of N. 007 (part 2 of 2) 10.0 points b)What is the tension in the horizontal cable?
*January 17, 2011*

**physics**

A block weighing 6.8 N requires a force of 2.9 N to push it along at constant velocity. What is the coefficient of friction for the surface?
*January 17, 2011*

**English**

transitive
*January 3, 2011*

**Physics **

A model rocket builder has constructed a rocket of total mass of 1.0kg. The rocket must achieve a speed of 300m/s 5seconds after vertically leaving the launch pad. A) What acceleration and net force is required? B) What thrust must the motor have to achieve this? Thank you!
*November 8, 2010*

**science**

name two ways mountains can effect the climate of an area
*November 3, 2010*

**Physics 11**

How much would a 80kg astronaut weigh on Earth? How much would they weigh 500 km above the surface of the Earth? Thank you!
*November 1, 2010*

**Science**

A revolutionary war cannon, with a mass of 2170 kg, fires a 18.1 kg ball horizontally. The cannonball has a speed of 146 m/s after it has left the barrel. The cannon carriage is on a flat platform and is free to roll horizontally. What is the speed of the cannon immedi- ately ...
*October 18, 2010*

**math**

one of the equal sides of an isoceles triangle is 3m less than twice its base. The perimeter is 44m. Find the length of the sides. The teacher gave us the answer of 17m for the two sides and 10 for the base. What formula did he use to find this.
*October 13, 2010*

**Physics**

An elevator starts from rest with a constant upward acceleration and moves 1m in the first 1.9 s. A passenger in the elevator is holding a 5.3 kg bundle at the end of a vertical cord. The acceleration of gravity is 9.8 m/s2 . What is the tension in the cord as the elevator ...
*September 19, 2010*