Friday

September 19, 2014

September 19, 2014

Total # Posts: 139

**math**

5184
*September 7, 2014*

**math**

If 1mechanic can do 4 machines in 6 hours how many machines can 48 mechanics do in 160 hours?
*September 7, 2014*

**math urgent please**

Thank you for your advice, I appreciate it really a lot, but unfortunately I always checked me writing and exercise is exactly copied from the book Oxvord IB diploma programme Mathematical studies standard level chapter 4 page 183. Why I was very confused because I'm ...
*September 3, 2014*

**math urgent please**

A fish tank in the shape of a cuboid has length 320 cm. Its length is twice that of its width. To enhance viewing, the area of the four vertical faces should be maximized. Find the optimum "viewing area" of a fish tank that is fixed to the wall so that the area of ...
*September 3, 2014*

**math**

Dear Steve, thank you so much for your really so huge help. I only wanted to ask you and I'm sure I'm wrong about it but Both students start with $200 and both how much money will have after they have passed START 10 times. I did: I used formula : un =u1+(n-1)d ...
*August 27, 2014*

**math**

Two students, Mary and John, play a game. Each time Mary passes “start” she received $25. Each time John passes “start” he receives 15% of the amount he already has. Both students start with $200. a. How much money will Mary have after she has passed “...
*August 27, 2014*

**Math**

1USD/xUSD = 0.753 EUR/ 610 EUR x= 810.09 USD 800 AUD/810.09AUD = 810.09 USD/1 USD x = 0.99 AUD Henry and Jack thank you so much for helping me but do you think my answer is correct? Thank you so much
*August 27, 2014*

**Math**

The exchange rate from US dollars (USD) to euros (EUR) is given by 1 USD = 0.753 EUR. Give the answers to the following correct to two decimal places. Roger receives 800 Australian dollars (AUD) for 610 EUR. Calculate the value of the US dollar in Australian dollars. Please ...
*August 27, 2014*

**5th grade math**

How do you find the dimensions of a box that hold 2xs as many cubes as a box that is 2 by 3 by 4?
*May 12, 2014*

**math**

Hi Steve, thank you so much for everything:))) Have a very nice day
*May 5, 2014*

**math**

Peter has a cylindrical block of wood od diameter 6 cm and height 18 cm. He glues the base to a board, but wants to paint the rest of the block. He wants to paint the bottom half of the wood black and the top half white. a) Calculate the surface area of the block that Peter ...
*May 5, 2014*

**Math**

Peter has a cylindrical block of wood od diameter 6 cm and height 18 cm. He glues the base to a board, but wants to paint the rest of the block. He wants to paint the bottom half of the wood black and the top half white. a) Calculate the surface area of the block that Peter ...
*May 5, 2014*

**math urgent please**

value of block is: 169,641 x0.03 $ / 12 = 0.42 $ 197.901 X 0.04 $/ 15 = 0.527736 $ 0.42 + 0.527736 = 0.947736 $ Petr could paint his entire block less than to $1.oo.
*May 4, 2014*

**math urgent please**

Petr has a cylindrical block of wood od diameter 6 cm and height 18 cm. He glues the base to a board, but wants to paint the rest of the block. He wants to paint the bottom half of the wood black and the top half white. a) Calculate the surface area of the block that Peter ...
*May 4, 2014*

**Math**

You are so so nice, thank you so much:)))))You saved my love!!!!
*May 4, 2014*

**Math**

Claire wants to determine how brightly to illuminate her stage. stage width (in metres) x stage length (in metres) x 0.14 = total watts for stage If her stage is 7.25 metros wide and 11.5 metres long, a) calculate the exact number of watts needid to illuminate the stage b) ...
*May 4, 2014*

**math**

Claire wants to determine how brightly to illuminate her stage. stage width (in metres) x stage length (in metres) x 0.14 = total watts for stage If her stage is 7.25 metros wide and 11.5 metres long, a) calculate the exact number of watts needid to illuminate the stage b) ...
*May 3, 2014*

**Math**

Caroline says to Jed, "If you insult me one more time, I am going to slap you!" Jed replies, "That's OK, Caroline. If I don't insult you, you will be able to slap me anyway." If p=you insult me one more time and q=I am going to slap you Explain ...
*May 3, 2014*

**Math**

Thank you so much . a)Equation is x=-1vertical asympt. Is it correct please?
*May 3, 2014*

**Math**

two functions are defined as follows: f(x)=3/x+1 and g(x)=x-6 a) Write the equations of the vertical and horizonal asymptotes of f. b) Determine the coordinates of the points where f(x) = g(x) Thank you so much for huge help Is ti correct please? answer for a) vertical asympt...
*May 3, 2014*

**Math**

A 12 cm by 12 cm ice cube tray is in the shape of a cuboid with twelve hemispheres inset. The depth of each hemispheres is 1 cm. a) If all the hemispheres were filled with water, calculate the total volume of water that the ice cube tray could hold. It is now desired to paint ...
*April 28, 2014*

**math **

A 12 cm by 12 cm ice cube tray is in the shape of a cuboid with twelve hemispheres inset. The depth of each hemispheres is 1 cm. a) If all the hemispheres were filled with water, calculate the total volume of water that the ice cube tray could hold. It is now desired to paint ...
*April 28, 2014*

**Math**

Steve, thank you so much, you are amazing!!!!!
*April 28, 2014*

**Math**

A swimming pool is in the shape of a cuboid with dimensions 50 metres long by 25 metros wide by 2.5 metres deep. If the pool is completely filled with water, calculate a) the volume of water in the pool b) the longest straight distance a swimmer could swim in the pool c0 the ...
*April 28, 2014*

**math**

Thank you so much, a) 25.1 cm^3 b) 6.28 cm ^2 c)144-75.36 =68.64 Is it correct? Thank you so much
*April 28, 2014*

**math**

A 12 cm by 12 cm ice cube tray is in the shape of a cuboid with twelve hemispheres inset. The depth of each hemispheres is 1 cm. a) If all the hemispheres were filled with water, calculate the total volume of water that the ice cube tray could hold. It is now desired to paint ...
*April 28, 2014*

**Math**

A 12 cm by 12 cm ice cube tray is in the shape of a cuboid with twelve hemispheres inset. The depth of each hemispheres is 1 cm. a) If all the hemispheres were filled with water, calculate the total volume of water that the ice cube tray could hold. It is now desired to paint ...
*April 27, 2014*

**math**

Thank you so much:)))
*April 9, 2014*

**math**

10t-640/t^2 = 0 Thank you so much for huge help:)))
*April 9, 2014*

**Math**

46354 miles might be the answer. I didn't say that it's right.
*March 26, 2014*

**LECTRICAL ENGINEERING**

WHAT IS THE FORMULAR FOR CALCULATING THERMAL ENERGY WHEN GIVEN CURRENT,VOLTAGE,TIME,TEMPERATURE
*March 6, 2014*

**math**

100=1.5((1.1^(n) - 1))/1.1-1 Could you be so nice please and help me find the solution. The answer is 22 but I have whole time different number. I use log on both sides : 100=1.5((1.1^(n) - 1))/1.1-1 10 = 1.5(1.1^(n) - 1) 10 = 1.65^n - 0.5) log 10.5 = n log 1.65 n = 0.21321 ...
*February 23, 2014*

**math**

100=1.5(1.1^n - 1)/1.1-1 Could you be so nice please and help me find the solution. The answer is 22 but I have whole time different number. I use log on both sides : 100=1.5(1.1^n - 1)/1.1-1 10 = 1.5(1.1^n - 1) 10 = 1.65^n - 0.5) log 10.5 = n log 1.65 n = 0.21321 Thank you so...
*February 23, 2014*

**math**

On the first day he runs 1.5 km. Every day he runs 10% more than the day befor. a) Write down the distance he runs on the second day of training. ..... 1,5km +0,15 = 1,65 km b) Calculate the total distance He runs in the first seven days of training. When I counted my answer ...
*February 22, 2014*

**life orientation**

what is life orientation?
*January 27, 2014*

**math**

U is the set of positive integers less than or equal to 30. A is the set of natural numbers that are multiples of 5 in U. B is the subset of all of the even integers in U. a) Find n(A U B) b) Find n(A intersect B) c) Find n(A U B' ) d Find n(B intersect A') Thank you ...
*January 25, 2014*

**math**

U is the set of positive integers less than or equal to 30. A is the set of natural numbers that are multiples of 5 in U. B is the subset of all of the even integers in U. a) Find n(A U B) b) Find n(A intersect B) c) Find n(A U B' ) d Find n(B intersect A') Thank you ...
*January 24, 2014*

**Math**

A is the set of all multiples of 4 that are less than or equal to 20. B is the set of all of factors of 24. Find A U B. Thank you so much for huge help:)))
*January 24, 2014*

**Math**

In a group of 105 students, 70 students passed Mathematics, 60 students passed History and 45 students passed Geography; 30 students passed Mathematics and History, 35 students passed History and Geography, 25 passed Mathematics and Geography, and 15 passed all three subjects...
*January 24, 2014*

**math**

In a group of 105 students, 70 students passed Mathematics, 60 students passed History and 45 students passed Geography; 30 students passed Mathematics and History, 35 students passed History and Geography, 25 passed Mathematics and Geography, and 15 passed all three subjects...
*January 23, 2014*

**Physics**

A bullet whose mass is 0.0015kg leaves a 5kg leaves a 5kg rifle at a muzzle velocity of 800 m/s. It strikes a 7kg block of wood and becomes embedded in it. After the bullet hits the rock, what is the speed of the bullet/ block system?
*January 15, 2014*

**math**

The graph of the function f(x)=2^x/a passes through the points (0,b) and (2,0.8). Calculate the values of a and b. Thank you so much for huge help:)))
*November 10, 2013*

**math**

A rocket follows a parabolic trajectory. After t seconds, the vertical height of the rocket above the ground, in metres, is given by H(t) = 37t – t . Find the length of time the rocket is in the air. Could you please explain me, why answer is 37s? Thank you so, so much:))
*October 24, 2013*

**math**

A company's weekly profit, in riyals, is modeled by the function P(u)=-0.032u^2+46u-3000. where u is the number of units sold each week. a) the maximum weekly profit. Answer: 13531.25 riyals b) the loss for week's holiday period, where no units are sold .Answer:3000 ...
*October 24, 2013*

**math**

A company's weekly profit, in riyals, is modeled by the function P(u)=-0.032u^2+46u-3000. where u is the number of units sold each week. a) the maximum weekly profit. Answer: 13531.25 riyals b) the loss for week's holiday period, where no units are sold .Answer:3000 ...
*October 23, 2013*

**math**

A company's weekly profit, in riyals, is modeled by the function P(u)=-0.032u^2+46u-3000. where u is the number of units sold each week. a) the maximum weekly profit b) the loss for week's holiday period, where no units are sold c) the number of units sold each at ...
*October 22, 2013*

**math**

A farmer has 110 metres of fencing to fence off a rectangular area. Part of one side is a wall of length 15m. Find the dimensions of the ﬁeld that give the maximum area. Answers: length and width = 31,25m Thank you so much for a huge help.
*October 22, 2013*

**math**

A farmer has 110 metres of fencing to fence off a rectangular area. Part of one side is a wall of length 15m. Find the dimensions of the ﬁeld that give the maximum area. Thank you so much for a huge help.
*October 22, 2013*

**physics**

football is kicked off with an initial speed of 66 ft/s at a projection angle of 45 degrees. A receiver on the goal line 63 yd away in the direction of the kick starts running to meet the ball at that instant. What must be his minimum speed (in feet/second) if he is to catch ...
*September 30, 2013*

**physics**

Suppose that it takes exactly 17.0 hr to drain a container of 6.20 liters of water. What is the average mass flow rate (in kilograms/second) of water from the container? Assume that the density (mass/volume) of water is exactly 1 g/cm^3.
*September 9, 2013*

**math**

550 GBP x 1.18 Euro = 649 Euro 649 - 629 = 20 Euro 1GBP x 20 Euro / 1.18 Euro = 16.94 Euro
*September 8, 2013*

**math**

Minni travels to Italy. She changes 550 GBP to euros at an exchange rate of 1 GBP = 1.18 euros. The bank charges commission and then gives Minni 629 euros. Find the amout of the commission in GBP. Thank you so much:))
*September 8, 2013*

**Math, HELP!! URGENT!**

Please Simplify: (1/8)(40v−24y)−(1/7)(21v−35y+9)−(1/6) (1/11)(55x−22)−(1/2)(18x−2v)
*August 29, 2013*

**social studies**

The Constitution didn't have any protection for individuals. They wanted to put in a Bill of Rights that specifically spelled out rights and freedoms of the citizens.
*May 1, 2013*

**Calculus**

A rancher wants to make an animal pen by fencing in an area of 2500000 square feet in a rectangular field and then divide it up with 5 fences down the middle parallel to one side. The rancher wants to use the shortest total length of fencing possible. If she accomplishes that...
*April 30, 2013*

**math**

1.65 - .50 is 1.15. If you have 11 dimes you'll get 1.10, then add a nickel to make it 1.15. So the twelve remaining coins are 11 dimes and a nickel.
*April 29, 2013*

**Biology**

I think it's b.
*April 28, 2013*

**American History**

I think it's b. There wasn't that many miles of railroad track in 1820.
*April 28, 2013*

**national governoment**

I'm not sure which Nullification you are speaking about, but in the Kentucky and Virginia Resolutions of 1798-1799 Thomas Jefferson and James Madison argued a state had the right to nullify a federal law. The Articles of Confederation, by creating a weak central government...
*April 22, 2013*

**Child Develompment**

I think anger is the answer.
*April 22, 2013*

**agriculture**

name one intensive and one extensive system of poultry farming
*April 2, 2013*

**agriculture**

explain how any three of the records which are kept for the efficient management of a dairy herd be used to improve management
*April 2, 2013*

**agriculture**

state and explain what records should be kept for the efficient management of a dairy herd
*April 2, 2013*

**agriculture**

what are the important features of a building which could be used as a milking shed(parlour),dairy(milk room) and food store to ensure production of clean fresh milk?
*April 2, 2013*

**agriculture**

so like what do they mean when they say outline and explain the objectives of fencing a farmland
*April 2, 2013*

**agriculture**

nah ma'am,it is a research project that am doing and a cant find the relevant answers when googling
*April 2, 2013*

**agriculture**

am a Lil bit confused,would you mind please elaborating a bit
*April 2, 2013*

**agriculture**

outline and explain the objectives of fencing a farmland
*April 2, 2013*

**Life Orientation**

5 factors that causes accidents
*March 20, 2013*

**Math**

6.3
*March 18, 2013*

**Maths-financial**

Determine the compound interest rate,correct to two decimal places,Emile would require to triple his investment over a period of 10 years?
*March 7, 2013*

**Maths-financial **

Lucas invests R4million into an account earning interest of 6% per annum compounded monthly.He withdraws an allowance of R30000 per month.The first withdrawal is exactly one month after he has deposited the R4million.How many such withdrawals will Lucas be able to make?
*February 27, 2013*

**Maths**

How dd u fynd dem....lyk de steps
*February 26, 2013*

**Maths**

In a quadratic sequence.....Term 2 is 11,Term 4 is -7,term 7 is -64....determin the general term for the sequence
*February 26, 2013*

**Maths-financial**

Ted needs to take out a loan to buy a new bicycle.He is able to repay the loan by means of 15 semi-annual payments of R2500,starting in 6months from now,when interest is 16% p.a compounded quartely.Calculate the amount of the loan
*February 19, 2013*

**Maths**

A farmer deposits R11 944, for 60 months to buy a tractor.suppose that 12 months afta the purchase of the present tractor and every 12 months thereafter,the farmer withdraws R5000 from his account to pay for maintanance of the tractor.If he makes such withdrawls,what will the ...
*February 10, 2013*

**Maths**

Determine how long in years it will take the value of a motor vehicle to decrease to 25% of its original value if the rate of depreciation based on the reducing balance method is 21% per annum?
*February 7, 2013*

**Maths**

How long would it take the 4th snail to travel 1km?
*February 6, 2013*

**Maths**

Thato caught 4 snails and placed them all in the same small circle on the ground and organised a race......1st snail travelled 24cm in 4minutes,2nd snail travelled 35 cm in 7minutes,3rd snail travelled 33cm in 5minutes and the 4th snail travelled 39cm in 6minutes..... (1)how ...
*February 6, 2013*

**Maths**

N is over the sigma sign which is 5 and r is under the sigma sign which is =1.......
*February 4, 2013*

**Maths**

If n=5 and r=1 (1+b)=10a,determine b in terms of a
*February 4, 2013*

**Maths**

1..The first 2 terms of a geometric progression are the same as the first two terms of an arithmetic progression.The first term is 12 and is greater than the second term.The sum of the first 3 terms od the arithmetic progression is 4/3 less than the sum of the first 3 terms of...
*February 3, 2013*

**Maths**

Eric thinks of 2 sequences.One is geometric and the other arithmetic.Both sequences start with the number 3.The common ratio of the geometric sequence is the same as the common difference of the arithmetic sequence.If the 6-th term of the geometric sequence is 96.Find the ...
*February 3, 2013*

**Maths**

An arithmetic and a geometric sequence have the same first terms.(2)....and the same second term say X..The sum of the first 3 terms of the arithmetic sequence equals to the third term of the geometric sequence.Calculate the first 3 terms of each sequences
*February 3, 2013*

**Maths and science**

The sum of the first n terms of a sequence is given by 4-4(1/2)^n.calculate the first 3 terms
*February 3, 2013*

**ferreira**

i need helo with this poem for sci that is about chlorine can some one help me
*December 12, 2012*

**algebra**

-4r^2+21r=r+13 3s^2-26s+2=5s^2+1 Please, please could you be so nice and help me with step by step, I can't find right solution, Thank you so much!!!!
*December 9, 2012*

**finance**

Given: WACC= 12%, NPV=+1,491.39, IRR=14.87378%, your all-equity firm has 5,000 common shares outstanding, and the cash flows are: CF0= -18,000, CF1= 3,000 CF2= 3,000, CF3=7,000, CF4?, CF5= 10,000. What is the cash flow at time-point 4.
*October 17, 2012*

**Finance Homework**

You are told by the finance section that a particular projects NPV is positive, but that the standard deviation of the NPV (after performing a monte carlo simulation) is exactly triple the expected NPV figure. If NPV is normally distributed, what is the probability that the ...
*October 17, 2012*

**geometry**

Find the length of a rectangle if its diagonal is 34 cm long and the angle the diagonal makes with the length is 27° 50'. (answer correct to the nearest centimetr) Thank you so much Could you be so nice and explain me ho I will count 27° 50'?
*May 25, 2012*

**geometry**

The sector shown is formed into a cone by joining its two radii. Calculate the volume of the cone correct to the nearest whole number. It shows a diagram with a 240 degree sector or two-thirds of a circle with a radius of 12 cm. How do I do this? Thank you so much
*May 15, 2012*

**geometry**

A tetrahedron is a triangular pyramid in which each face is an equilateral triangle. Calculate the volume of a tetrahedron that has all its edges 6 cm in length. Hint: You will need to know some geometry and trigonometry.
*May 15, 2012*

**geometry**

Calculate the volume of a square pyramid if it has a base area of 64 cm^2 and the distance from the apex to a corner of the base is 15 cm. Thank you so much!!!
*May 15, 2012*

**geometry**

Find the surface area of pyramid that has a regular hexagonal base od edge 6 cm and a height of 8 cm. Thank you so much
*May 13, 2012*

**geometry**

Find the surface area of pyramid that has a regular hexagonal base od edge 6 cm and a height of 8 cm. Thank you so much
*May 13, 2012*

**algebra**

A rectangular prism has a volume of 750 cubic millimeters. Its length is 15 millimeters, and its width is 10 millimeters. What is its height
*May 7, 2012*

**algebra**

The equations are 2x+y=80 and 2x=y. "x" being the widthof the fence coming off the barn and "y" being the length connecting those two pieces. When one side is as big as nessasary (aka the barn, river, wall, etc.) the length is double the width. The ...
*March 5, 2012*

**chemistry**

Arrange the species O2, O2^+, O2^-, and O2^2- in order of increasing O-O bond length.
*March 4, 2012*

**chemistry**

Al(NO3)3 + NH3 --> ?
*February 24, 2012*

**chemistry**

I^- H5IO6 BrO2 HClO I2 Which could not disproportionate?
*February 19, 2012*