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March 23, 2017

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Posts by John

Total # Posts: 8,282

Maths
The diagram shows a tent which has a rectangular base with vertical sides of height 2m, width 6m and length 8m, surmounted by a pyramid. The vertex,v, of the pyramid is 3m above the centre of the base of the tent Calculate the area of the triangular face VEF Calculate the area...
March 21, 2017

ICT
consider an organization as a computer system and identify its components
March 21, 2017

Science - hyperthyroidism
Hello, Can someone explain to me how does negative feedback loop work with a person whose condition is hyperthyroidism? How does graves disease effect the homoeostasis of the thyroid function and its production of hormones I am reading the book but it does not make sense at all.
March 20, 2017

Electricity and Magnetism
When you apply a magnetic field to a material it is observed that the magnetic field inside decreases. What material property have you observed? a) Paramagnetism b) Diamagnetism c) Ferromagnetism
March 20, 2017

MATHEMATICS
Find the curved and total surface area of a right circular cone,of base radius 8cm and height 10cm
March 20, 2017

Information Technology
what did Microsoft do to prevent viruses like Melissa virus?
March 19, 2017

Pre-cal
Determine two positive integers such as 5 less than two times the first number is the second number. The sum of the second number and the square of the first is 115.
March 15, 2017

Maths
What is the capacity of a cylinder tank of diameter 3.5m and height 4m in litres (pie22/7)
March 14, 2017

Math
a) the center is (5,-3) and the radius is the square root of 49 = 7. (x-a)^2+(y-b)^2 = r^2 is the formula for the circle. This is why the center values are the opposite of what is in the formula above.
March 14, 2017

Math
A + S=120 6A +4S = 600 Use substitution A= 120-S 6(120-S) + 4s = 600 720 -6S + 4S = 600 720 -2S = 600 Can you finish from here?
March 13, 2017

Algebra Susie is wrong
It says to evaluate. Therefore, just put the -4 in for the x^2 and simplify. (-4)^2 - 18 simplifies 16 -18 simplifies to -2 If this is an expression there should not be an = sign. I am assuming the -10 wouldn't be there.
March 11, 2017

Calculus - Derivatives
Use implicit differentiation to find the second derivative y'' of the function given. x^2 + 5y^3 = 8
March 10, 2017

Electricity and Magnetism
Consider free protons following a circular path in a uniform magnetic field with a radius of 1m. At t =0s, the magnitude of the uniform magnetic field begins to increase at 0.001 T/s . Find the tangential acceleration of the protons .
March 10, 2017

Government
Does Japan have a stronger civil society than South Korea?
March 9, 2017

maths for management
suppose a retail business sells its commodity at a margin of 25% on all items purchased and sold.moreover the company used a 5% commission as saving expense and 12000 at a fixed cost.find the breakeven revenue
March 8, 2017

maths for management
suppose a retail business sells its commodity at a margin of 25% on all items purchased and sold.moreover the company used a 5% commission as saving expense and 12000 at a fixed cost.find the breakeven revenue
March 8, 2017

Math Help
Melanie would like to have $25,706.30 in an ordinary annuity in 5 years. The annuity has a 10.8% annual interest rate, and she plans on making quarterly deposits. How much should she deposit per quarter? Would this be the way I solve the question? (1+.108/4)^5-1 [.108/4] = ....
March 6, 2017

Physics
Consider classical electron orbit with radius 53pm (picometers) that has a magnetic moment equal to sqrt(2)*?B (the Bohr magneton). What is the current of that orbiting electron in A?
March 5, 2017

math
arrange the following fractions starting with lowest 1.2/4,3/9,3/15,25/100 2.5/15,2/8,3/6 3.2/10,4/12,4/20 4.4/16,20/100 5.4/8,3/12,5/10,6/18 6.2/5,6/10,13/20,31/50 7.11/25,1/4,3/50
March 2, 2017

Math
There are 24 kids and 1152 cookies. When distributed evenly, how many cookies would each kid receive?
February 28, 2017

Pre Calculus 30
1. 6!/(2!2!) 2.(9!/(2!3!)-8!/2! 3.3x(5!/3!2!)x3 4.9!/3!4!2! 5. 3! 6!/3! 6.8!/2!x3! 7.1x(5!/3!2!)X1 8.7!/4!3!
February 28, 2017

Pre Calculus
Am I correct? Please show me how if I am wrong 1.How many 6 digit numbers can be made using each of the digits {8,8,9,5,5,6} exactly once? 6!=702 2.How many more arrangements are there from all of the letters of the word MARMALADE than there are from all of the letters of the ...
February 28, 2017

Pre Calculus 30
for number 3 why do you times both?
February 27, 2017

Pre Calculus 30
1.How many positive integers five-digit integers end with the digit 0? 9x10x10x10x? what number would represent zero 2.Using the digits {1,2,5,6,7,9} and not allowing repetition of digits, how many positive three-digit integers can be made that are larger than 500? 9x5x4 3....
February 27, 2017

Math Need Help!!
Which Number Is A Perfect Square? A. 32~~~~ B. 144 C. 1000 D. 36000
February 27, 2017

math
IT division budget for the current year is $300,000. they already spent 10% of the budget on equipment, 66% on salaries, 8% on training and 31/2% on supplies. How much money does division have left in its budget for the remainder of the year?
February 24, 2017

Pre Calculus 30
For number 4 will it be 8999 but times it by two since its asking integers so negative numbers count?
February 24, 2017

Pre Calculus 30
1.How many positive four-digit integers can be formed that are even?9x9x9x5=3645 2.Three differently colored six-sided dice are rolled. In how many different ways can the dice turn up? 6x6x6=216 3.How many positive integers five-digit integers start with the digit 1?1x9x9x9x9=...
February 24, 2017

Science
Which material is the densest air,water,plastic,or iron
February 23, 2017

Math
What Is the measure of an angle that is complementary to a 47 degrees angles? A. 43 degrees B 53 degrees~~~ C. 153 Degrees D. 180 Degrees
February 23, 2017

Math
Explain How To Construct A Perpendicular bisector
February 23, 2017

Math
5229
February 23, 2017

math
f(x)=ax^3+bx^2+cx+d and f(0)=-18 determine the equation of f
February 23, 2017

English
I need help on these four questions. I was sick from class one day and now I am very confused about what is happening in Romeo and Juliet. Here are the questions in need help with: 15. A foil is a character that highlights, through sharp contrast, another character's ...
February 21, 2017

Pre Calculus 30
1.How many positive three-digit integers can be made from the digits {3,4,5,6,7} if digits may be repeated? 5x4x3=60 2.In how many ways can all of the letters of the word HEXAGON be arranged if the arrangement must start with a consonant and end in a vowel? 4x3x1x2x3x4x5=1440 ...
February 20, 2017

Pre Calculus 30
I'm having a hard time understanding the fundamental counting principal and I don't even know where to start on some of the questions.Here are a few questions I'm having trouble with. 1.Andrea, Brian, Carol, David, Emmalee, Floyd, and Gloria are to stand in a line ...
February 20, 2017

Vectors
1.7 km wide. Srry
February 20, 2017

Vectors
A boat is capable of 20 km/h in still water. You wish to cross the river downstream so that the angle the boat's push makes with the bank is 50 degrees. At what angle to the bank should the boat steer if the current is 8 km/h? How long will it take to cross if the river is...
February 20, 2017

chemistry
You have 1683.8 g of a bleach solution. The percent by mass of the solute sodium hypochlorite, NaOCl, is 3.62%. How many grams of NaOCl are in the solution?
February 19, 2017

chemistry
What are the molality and mole fraction of solute in a 25.5 percent by mass aqueous solution of formic acid (HCOOH)?
February 19, 2017

chemistry
What is the molality of a solution containing 11.1 g Na2SO4 dissolved in 2269.2 g of water?
February 19, 2017

chemistry
What volume of a 3.90 M KI stock solution would you use to make 0.430 L of a 1.25 M KI solution?
February 19, 2017

chemistry
i got this one wrong
February 19, 2017

chemistry
How many grams of CaCl2 would be dissolved in 1.1 L of a 0.17 M solution of CaCl2?
February 19, 2017

math
a cyclist rides for 5 hours at a certain speed and then for 4 hours at a speed 6 km/h greater than her original speed. If he rides 294 km altogether, what was her initial speed?
February 18, 2017

Math Help
If 4 cards are drawn randomly from the standard deck of 52 cards, what is the probability that all 4 cards are red cards? How would I set this up? there are 26 red cards So I would take 26/52 and 48/52? If this is correct, would I multiply them? Thanks
February 16, 2017

Math
The diagonal of a square garden 17ft. Determain the perimeter of the garden, rounded to 3 decimal places.
February 16, 2017

Math (Algebra 2)
Ann and Tom want to establish a fund for their? grandson's college education. What lump sum must they deposit at a 9.39?% annual interest? rate, compounded annually?, in order to have ?$20,000 in the fund at the end of 10 ?years? I cannot get the right answer.
February 16, 2017

Algebra
What is the value of n such that 2^n=4^4 x 8^8 x 16^16?
February 12, 2017

Cmax
Thanks Steve. How would I use the ln function instead of e on the calculator? It's been ahile since I took algebra. So e equals ln?
February 9, 2017

Cmax
How do I solve for Cmax= 8.5/ e(-0.257 * (1-0.5))? Also, how would I input 'e' in my calculator?
February 9, 2017

Continuity Calculus Help
Find the value of constants c and d that make the function below continuous at x = 4. f(x) = x2 ? 3x x < 4 c x = 4 d + x x > 4 c = d = 8 I got d=8, but finding c is giving me trouble.
February 8, 2017

Continuity Calculus Help
9.0/1 points | Previous Answers SSTCalc6 2.3.046.My Notes Question Part Points Submissions Used Let f(x) = 4x2 if x > 2 4x + 3 if x ? 2. Show that f is continuous from the left at x = 2, but not from the right. lim f(x) = n?2? f(2) = lim f(x) = n?2+
February 8, 2017

Physics
Car A is 12 m ahead of car B on a straight stretch of road. Car A starts from rest and accelerates away from B at 4.0 m/s2. Two seconds later B starts from rest and accelerates after A at 6.0 m/s2. How long will it take B to catch A? How far will B have travelled?
February 7, 2017

math
You find a sales receipt from a store that shows the total price as $40, and the total amount paid including sales tax as $42. a. Write an equation you can use to find the sales tax rate rr. An equation is 42=42= .What should the equation be?
February 6, 2017

Math
Prove that limit(z -> z_0) z^2 = z_0^2 I must show that for any positive number E that there exists a positive number delta so that whenever this is true: 0 < |z - z_0| < delta then this is true: |z^2 - z_0^2| < E
February 5, 2017

Pre-Calculus
u dot v / |v| (1.6*-2.1 + 3.3*-0.5) / sqrt(2.1^2 + 0.5^2) -2.32
February 5, 2017

Chemistry
Consider a one step reaction. Which of the following does not describe the activation energy of the process? The minimum amount of energy needed for a reaction to occur The energy difference between the starting point and the transition state The energy difference between the ...
February 4, 2017

Physics
A hollow sphere has a uniform volume charge density of 4.61 nC/m3. The inner radius is a = 14.6 cm and the outer radius is b = 43.8 cm. What is the magnitude of the electric field at 21.9 cm from the center of the sphere? What is the magnitude of the electric field at 140. cm ...
February 3, 2017

Science
The doctor ordered an IV infusion of NaCl at 125 ml/hr for the next 48 hours. THe drop factor for the IV tubing is 10. 1) calculate the gtts/min Answer: 23 gtts/min 2) calculate the total amount of IV fluid the client will receive in 48 hours. I got 6000 ml.... Anyone check ...
January 30, 2017

Calculus can you please show me the step by step s
The intensity of light varies inversely as the square of the distance from its source. If two searchlights are 600 meters apart and one light is 8 times as strong as the other, where should a man cross the line between them in order to be illuminated as little as possible
January 28, 2017

Calculus
The intensity of light varies inversely as the square of the distance from its source. If two searchlights are 600 meters apart and one light is 8 times as strong as the other, where should a man cross the line between them in order to be illuminated as little as possible
January 28, 2017

chemistry
an over the counter pain reliever melts at 78degree celcius. convert this temperature to f and k
January 25, 2017

chemistry
how many fluid ounces are contained in 1qt of milk. 2.how many cups are contained in 1l of soda
January 25, 2017

chemistry
how many fluid ounces are contained in 1qt of milk how many cups are contained in 1l of soda
January 25, 2017

chemistry
a woman was told to take a dose of 1.20g of calcium daily ,how many 200mg tablets should she take^
January 25, 2017

Math
A dessert recipe calls for2 1/2 cups of milk how. Many cups of milk are needed for 8 servings?
January 24, 2017

math
An investment of 25,000 earns interest at an annual rate of 8.4% compounded continuosly a. find the instantaneous rate of change of the amount in the account after years b. find the instantaneous rate of change of the amount in the account at the time the amount is eqaul to 30...
January 22, 2017

Chemistry
Calculate deltaH for the reaction NO (g) + O (g) ----> NO2(g) given following NO + O3 ----> NO2 + O2 deltaH=-198.9 kj O3 ---> 3/2 O2 deltaH= -142 kj O2 -----> O2(g) deltaH=495
January 21, 2017

physics
A hoodlum throws a stone vertically downward with an initial speed v0 from the roof of a building, a height h above the ground. (a) How long does it take the stone to reach the ground? (b) What is the speed of the stone at impact? Give your answers in terms of the given ...
January 19, 2017

physics
A hoodlum throws a stone vertically downward with an initial speed v0 from the roof of a building, a height h above the ground. (a) How long does it take the stone to reach the ground? (b) What is the speed of the stone at impact? Give your answers in terms of the given ...
January 19, 2017

Math Help
I am trying to work this problem out. I know that the systematic counting principle is used. However, I cannot get the right answer. For the first part, I took R=2 N=6 6!/(6-2)! (Permutation). Answer: 30 choices for the Chair/Vice The second part, I took R=2 N=8 Combination ...
January 18, 2017

Math
I am trying to work this problem out. I know that the systematic counting principle is used. However, I cannot get the right answer. For the first part, I took R=2 N=6 6!/(6-2)! (Permutation). Answer: 30 choices for the Chair/Vice The second part, I took R=2 N=8 Combination ...
January 18, 2017

math
Two number are in the ratio 4:7 if the smallest is 36 what is the largest number?
January 17, 2017

Math
find f'(x) find the slope of the graph of f a x=2 and x=4 find the equations of the tangent lines at x=2 and x=4 and find the value(s) of x where the tangent line is horizontal. f(x)=2x^2+8x I found that f'(x)=4x+8 and that the slopes were 16 and 24 and the equations ...
January 16, 2017

mathematics
the first four terms of an arithmetic sequence are -1
January 15, 2017

Math
Four hours after the start of a 600 mile auto race, a driver's velocity is 150 miles per hour as she completes the 352nd lap on a 1.5 mile track a) find the drivers average velocity during the first four hours of the race. b) let f(x) represent the distance traveled (in ...
January 11, 2017

Math
Find the limit f(x) = -(x^2)/(x+3) a) lim f(x) x-3^- b) lim f(x) x-3^+ c) lim f(x) x-3 I know that a is dne because of the graph and that b is -infinity. And that c is dne because they are not the same. But I do not know how to do this algebraically. Thank you
January 9, 2017

Calculus
How do you find the total distance a particle travels on a given interval on a graph and net distance?
January 5, 2017

Math
Find the average rate of change in height of the orange from t=2 to t=5 (in feet per second) The equation is h (t)=605+15t-4.9t^2 in feet. I know the the average rate of change is change in q/ change in time. Do I put t=3 and subtract the quantity of 5 and 2 in the formula for...
January 4, 2017

quantitative analysis for decision making
. A food industry produces chips at three factories, located in Birmingham, Glasgow and London. Since the customer should be supplied with fresh products, these are not stored in the factories. The monthly production ability of the factory in London is 750 tones, while of the ...
January 4, 2017

managerial Economics
Yell-O Yew-Boats, Ltd. produces a popular brand of pointy birds called Blue Meanies. Consider the demand and supply equations for Blue Meanies: QD, x = 150 - 2Px + 0.001I + 1.5Py QS,x = 60 + 4Px - 2.5W Where Qx = monthly per-family consumption of Blue Meanies Px = price per ...
January 4, 2017

Geometry
A dilation scale factor 2 maps triangle RST to R'S'T'. The perimeter of triangle RST is 60. What is the perimeter of triangle R'S'T'?
December 30, 2016

english
can you give me a good topic for my english presentation test
December 29, 2016

Math
7+2+6 = 15 =17 8+ 3 + 7 =18 or maybe 8 + 2 + 7
December 28, 2016

math
At a basketball game, a vender sold a combined total of 116 sodas and hot dogs. The number of sodas sold was three times the number of hot dogs sold. Find the number of sodas and the number of hot dogs sold
December 20, 2016

ss
i need anwsers for this 1. What was the last battle associated with the War of 1812? (1 point) a.Battle of New Orleans b.Battle of "Old Ironsides"to B.attle at Montreal d.Battle at Baltimore 2. For what is the War of 1812 BEST remembered? (1 point) the Battle at New ...
December 19, 2016

Algebra
Mervin tells Aquilla that he has a bag with very small rocks in it. She asks how many, and he says that if you add one hundred million very small rocks to the bag, it will contain 36 more very small rocks than the number in ten thousand of the bags minus five times the number ...
December 17, 2016

Physics wave motion
A radar array consists of five vertical antennae arranged in a line, each emitting radio waves of frequency 120MHz in phase with one another uniformly in all directions. The spacing between each of the antennae is 8.0m. Apart from the normal direction perpendicular to the line...
December 16, 2016

math
The shape of a milk carton is a solid composed of a rectangular prism and a pyramid as shown. What is the formula for finding the volume of the milk carton?
December 11, 2016

math
1/27
December 11, 2016

math
A rectangular prism has a volume of 162 cubic centimeters. If the length, width, and height are reduced to 1/3 of their original size what will the new volume be?
December 11, 2016

math
6 cm^3
December 11, 2016

math
A rectangular prism has a volume of 162 cubic centimeters. If the length, width, and height are reduced to 1/3 of their original size what will the new volume be
December 11, 2016

chemistry
The edge of a body-centered-cubic unit cell ( which contains two atoms per unit cell) of an element Y was found to be 2.16x10^-8cm. The density of the metal is 19.35g*cm^-3. What is the approximate molar mass of Y?
December 10, 2016

chemistry
The edge of a body-centered -cubic unit cell (which contains two atoms per unit cell) of an element Y was found to be 3.16x10^-8cm.The density of the metalis 19.35g*cm^-3. What is the approximate molar mass of Y?
December 10, 2016

precalculus
Convert to Rectangular: r*tan?/sec?=2
December 9, 2016

Algebra
Students can buy tickets to a basketball game for $1.the addition for adults is $2 if 350 tickets were sold and the total money made was $450, how many student and adult were purchased?
December 7, 2016

pre calculus
In the rectangular coordinate system, each point (x, y) has a unique representation. Explain why this is not true for a point (r, ?) in the polar coordinate system.
December 7, 2016

precalculus
Convert to Polar: (3, -7) A) ( ?58, 337) B) ( ?58, 23) C) ( ?6, 337) D) ( ?6, 23) I do not know which is the correct answer because I worked it out and got (?58, -66.8014) Could you please tell mewhich answer is the right one
December 7, 2016

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