Sunday
December 11, 2016

# Posts by kelvin

Total # Posts: 133

MATH
If vector a + vector b + vector c = 0.and magnitude of a = 3,magitude of b = 5 and magnitude of c = 7.Find the angle between a and b?please anyone to help me i have exam tomorrow
December 8, 2016

chem
A sample of H2(g) expands adiabatically and reversibly from a state 1 where p1 = 200000Pa,V1 = 0.002m3 and T1 = 300K to a state 2 where V2 = 0.004m3.Assume the gas to behave as an ideal gas calculate the final temperature and its pressure.Use the constant value,Cp = 28.8 j/...
November 8, 2016

math
how about the time because from interest,I = prt
November 8, 2016

math
When the rate of interest in the bank is increased from 5% to 6% per annum,Gerald deposits Tsh 12,000 more into his account.If annum interest now received by him is Tsh 1100 more than that before,find his original deposit.**please anyone to help me with the solution***
November 8, 2016

Math
thanks for your solutions @steve and reiny
November 7, 2016

Math
Joseph deposited a certain amount of money.He earned one over nine of its principal at the number of years equal to the rate provided.Find the interest rate provided.**i need your help guys+++
November 7, 2016

Chemistry
The molar enthalpy of combustion of demand is -6.78KJ/mol.What mass of decane would have to be burned in order to raise the temperature of 500ml of water from 20 degrees Celsius to 55 degrees celsius. I tried using ndeltaH=mcdeltat. But it didn't work. Please help
October 17, 2016

Math
Mabatini primary school sold to a nearby school a third of her sacks of beans harvested last year,and used one over four of the remaining for food.If the remaining sacks were sold to the pupils at the price of 8000 shillings each,and thus giving the total amount of 216000 ...
September 15, 2016

Math
Ten years ago the age of Mukajange was one over five of that of his father then.Five years to come the age of Mukajange will be a half of that of his father.Find the present age of Mukajange.#####Please any one to help me
September 15, 2016

MATH
Fupi used 0.2 of his salary,sh 32,800 per month for school fees,quarter of the remained amount,he deposited at the bank and the rest amount used for other expenses.How much were used for other expenses?******************To my side,i solved like this tell me whether i am ...
September 15, 2016

MATH
Fupi used 0.2 of his salary,sh 32,800 per month for school fees,quarter of the remained amount,he deposited at the bank and the rest amount used for other expenses.How much were used for other expenses?******************To my side,i solved like this tell me whether i am ...
September 15, 2016

math
Fupi used 0.2 of his salary,sh 32,800 per month for school fees,quarter of the remained amount,he deposited at the bank and the rest amount used for other expenses.How much were used for other expenses?#########To my side,i solved like this tell me whether i am correct or not...
September 14, 2016

math
Fupi used 0.2 of his salary,sh 32,800 per month for school fees,quarter of the remained amount,he deposited at the bank and the rest amount used for other expenses.How much were used for other expenses?#######please anyone one to help me with the solution***************may i ...
September 14, 2016

math
To my side,i solved like this tell me whether i am correct or not........................ 0.2 of his salary is for school fees in which the school fees = 32,800.let the salary be y then, 0.2 × y=32,800 which gives the value of y as the salary =164,000.Quarter of the ...
September 14, 2016

math
may i assume 32,800 as the school fees that can be correct mr.Reiny?
September 14, 2016

math
Fupi used 0.2 of his salary,sh 32,800 per month for school fees,quarter of the remained amount,he deposited at the bank and the rest amount used for other expenses.How much were used for other expenses?please anyone one to help me with the solution
September 14, 2016

maths
A plane leaves an airport x,20-60E and 36-80N and flies due south along the same longitude for 8hours at the rate of 1000km/h to another airport Y,20-60E and titaS.the plane then flies west to another airport Z for 8hours at the same speed. Calculate to the nearest degree (a) ...
September 6, 2016

math
The average age of 24 pupils is 15 years while the average age of 16 pupils is 14 years.What is average age of 40 pupils in a class?please i need anyone to help me
September 2, 2016

math
it comes 14.6 years do i suppose to write that answer or i should approximate to 15 years because there is no decimal or fraction years
September 2, 2016

math
thank @ms sue help me out this one also............The average age of 24 pupils is 15 years while the average age of 16 pupils is 14 years.What is average age of 40 pupils in a class?
September 2, 2016

math
Marium travels a distance of 8 km everday to and from the school.What is the total distance will she travel for 40 days? i need a help please
September 2, 2016

algebra help
from x-y=0 then x=y.substitute into x-2y=6 it will be y-2y=6,which y= -6 and since x=y then x= -6
August 27, 2016

math
find the next number in the following sequence 110,98,87,71,___ please i need someone to give an answer
August 26, 2016

Math
tuesday because it will be second day after the two weeks
August 26, 2016

math
if the total surface area of a pipe is 396 cm^2 and its height is 14 cm.find the diameter of the pipe.any one to help me please
August 24, 2016

math
are we counting 17th as day one till 4th as the day last or we are starting 18th as the day one.@Ms.sue
August 23, 2016

math
Gillian did not attend to school from 17th january 2012 to 4th february 2012.How many days did Gillian miss the school?please anyone to solve it and show clear solution
August 23, 2016

Math
Brianna is a flight student and is in the process of acquiring her private license in a Solo flight she uses a single engine airplane and travels a distance of 15 meters before takeoff in the air she travels at an approximate rate of 27 m/s on there no wind conditions use an ...
August 23, 2016

math
@Ms.Sue
August 18, 2016

math
i thought the question require the total value which is 0.02
August 18, 2016

math
what is the value of 2 in 36.325.#any one can answer this#
August 18, 2016

math
what is the value of 2 in 26.325.#any one can answer this#
August 18, 2016

math
Greetings telegram on special code:50cts Ordinary telegram costs sh 3 for 10 words ,each extra word at 30 ct. Find the cost of the following telegram. CHARLES MUSHI BOX 123 MUSHI WISHING YOU A MERRY CHRISTMAS PETER JOHN #The problem is on greeting telegram and ordinary ...
August 17, 2016

math
then you should add cost for first ten words plus cost for extra 3 words plus cost of greeting telegram code which is 50 ct??? 3 sh +3*30cts+50cts am I correct?
August 17, 2016

math
The problem is on greeting telegram and ordinary telegram.there are 13 words so how can i apply the rate of charges
August 17, 2016

math
Greetings telegram on special code:50cts Ordinary telegram costs sh 3 for 10 words ,each extra word at 30 ct. Find the cost of the following telegram. CHARLES MUSHI BOX 123 MUSHI WISHING YOU A MERRY CHRISTMAS PETER JOHN. #how can i arrive to the answer,i need your help#
August 17, 2016

math
so the water will not wet one of the base area of the cylinder since you said lateral area and the formula is 2*pie*r*h
August 17, 2016

math
A cylindrical tank of diameter 4m contains water to a height of 3 m.What area of the surface is wet? any idea please
August 17, 2016

math
write 1459 into italics numeral. please anyone to help me I stuck whether the italic is the same as roman number and my teacher repeat the same question twice
August 17, 2016

math
James paid Tsh 10000 to buy the following items: 4.5 kg@600/=,2kg@1200/= and tomatoes 3kg by 1500/=.How much did he remain?#any one to help me please *
August 17, 2016

math
Write in italic numeral 1959. #any one to help me please***
August 17, 2016

math
Write in italic numeral 1959.+any one to help me***
August 17, 2016

math
James paid Tsh 10000 to buy the following items: 4.5 kg@600/=,2kg@1200/= and tomatoes 3kg by 1500/=.How much did he remain?#any one to help me please *
August 17, 2016

math
Ali puts sh 5000 for 1 year and Alex puts sh 8000 for 9 months to start a business.They shared their profit at the end of the year.Ally share comes to sh 2000.What will be Alex's share? please I need your help* the answer is 2400/= hw can I arrive that answer
August 16, 2016

math
Ali puts sh 5000 for 1 year and Alex puts sh 8000 for 9 months to start a business.They shared their profit at the end of the year.Ally share comes to sh 2000.What will be Alex's share? please I need your help*
August 16, 2016

math
Ali puts sh 5000 for 1 year and Alex puts sh 8000 for 9 months to start a business.They shared their profit at the end of the year.Ally share comes to sh 2000.What will be Alex's share? please I need your help*
August 16, 2016

math
the radius of semi circle is 30 cm.Find its circumference Note:what formula can i use (pie*r + 2r) or (pie*r + r)
August 15, 2016

math
find the square root of √625. #any idea please
August 15, 2016

math
Two boys,John and Jackson are running at different speeds of 30 km/hr and 18 km/hr and in opposite directions are 10 km apart.If they both start running at exactly 11:50 pm,at what time will John pass Jackson?Anyone to help
August 1, 2016

math:age
salima's current age is half that of her uncle.9 years ago the age of salima was 1/3 the current age of her uncle. Find the current age of Salima
July 23, 2016

math
if the ratio of interior angle of triangle are 4:11:3.Find the greater angle.* i am confused about the word greater does the question need the angle with 11 ratio or 4 ratio?
July 20, 2016

math
please any concept or formula for the previous question,i stuck
July 19, 2016

math
if a cone is cut through the centre where it makes perpendicular to the vertex.what will be the surface area of the obtained half the cone
July 19, 2016

math
it will be 10 days or 10 hours @ reiny
July 17, 2016

math
A can finish a work in 24 days , B in 9 days and C in 12 days. B and C start the work but are forced to leave after 3 days.The remaining work was done by A in ? any idea please i used work rate concept but i did not reach to the answer
July 17, 2016

MATHS
muta is on the top of 500m cliff looking down at boat. what is the angle of depression of the boat from the top of cliff?
July 12, 2016

Maths
(1) A cone has height of 8cm and circular radius 6cm calculate (a) It's Volume (b) It's Slant Height (c) The Curved Surface Area (d) The Total Surface Area
June 16, 2016

math
find the area of the cone cut from its vertices to make half of it with radius 14 cm and slant height 20 cm see the figure below
May 3, 2016

science
a car reduced it's velocity uniformly from 21m/s to14m/s in 10seconds (A) find the retardation (B) the distance cover in this time
March 1, 2016

science
Express the value of time in s.I units 2hours 35 seconds I tried multiplying but gave me wrong answers and objectives are 7200 3600 9300 2100
February 21, 2016

Chemistry
Aspirin can be prepared in the chemistry laboratory by the reaction of salicylic acid with acetic anhydride. What volume of acetic anhydride is required to produce one killogram of aspirin assuming 100%yield
February 11, 2016

english
it is good from vist you to bat cook lol bad to you hoy mond gils round just nine give van bove
January 22, 2016

Physics
I don't know
September 23, 2015

math
find the arc length of the curve y = lnx for x = 1 to x = square root of 8
September 1, 2015

Physics
A 58 kg woman is ice-skating toward the east on a frictionless frozen lake when she collides with a 94 kg man who is ice-skating toward the west. The maximum force exerted on the woman by the man during the collision is 210 N, west. Take east to be the positive direction of ...
February 25, 2015

Chemistry 1010
How many grams of Ag2CO3 will precipitate when excess K2CO3 solution is added to 70.0 mL of 0.692 M AgNO3 solution? 2AgNO3(aq) + K2CO3(aq) --> Ag2CO3(s) + 2KNO3(aq)
January 8, 2015

math
5gal 1qt - 2qt 1pt= _gal _qt _pt
November 29, 2014

physics
if a load 1kg streches a cordby 1.2cm.what is the force constantof the cord?
November 6, 2014

Physics
kelvin
November 3, 2013

Binomial and Poisson distribution
A machine produces ribbon in which flaws occur randomly at an average rate of one flaw in 100m. Find the probability that there are 3 or more flaws in a randomly chosen 200m of ribbon. Find the length of ribbon such that the probability that it contains no flaws is 0.001. ( Is...
June 1, 2013

Statistics normal distribution
54% of the children in a large city are boys. Using a suitable approximation, calculate the probability that a random sample of 1000 children contains more boys than girls ?
June 1, 2013

physics
if the shortest lenggth of the tube for resonance is 0.1m and next resonance length is 0.35m what is the frequency of the vibration
May 30, 2013

physics
if the shortest lenght of the tube for resonance is 0.1m and next resonanc length is 0.35m what is the frequency of the vibration.
May 30, 2013

chemistry
After 273 m3 of ethylene oxide is formed at 748 kPa and 525 K, the gas is cooled at constant volume to 293 K.The new pressure is _____kPa
March 5, 2013

chemistry
If methane at a pressure of 3.2 atm and at 21 °C is introduced into a container, the gas be heated to ______°C to increase the pressure to 12 atm. is it 352???
March 5, 2013

chemistry
i got 831 i don't think this is right???
March 5, 2013

chemistry
i got 352 is that right
March 5, 2013

chemistry
If methane at a pressure of 3.2 atm and at 21 °C is introduced into a container, the gas be heated to ______°C to increase the pressure to 12 atm.
March 5, 2013

Sound engineering
A Question of engineering about Sound. How to calculate in step by step? Thank you. The octave bands¡¦ Sound pressure levels in dB re 20 £g Pa are: Hz 57 129 220 420 1K 2K 4K 8K dB 85 95 90 80 88 70 68 72 What is the overall A-weighted sound pressure level?
February 28, 2013

Math
(x^2+y^2)^2=4(x^2-y^2) Equation of a lemniscate curve ?! Can you solve this
January 26, 2013

Math
(x^2+y^2)^2=4(x^2-y^2) Equation of a lemniscate curve
January 26, 2013

Physics
In order for a satellite in free fall to maintain uniform circular motion, ______________. a) there must be a tangential acceleration b) there must be angular acceleration c)there must be a centripetal force d) there must be a circumventing force Its either a or c. Can't ...
November 23, 2012

Physics
For which of the following situations can the equation F = mg not be used to calculate the force due to gravity? a) The pull of gravity on an apple on the surface of the Earth. b) The pull of gravity on an airplane flying at an altitude of 8 km above the surface of the Earth. ...
November 19, 2012

Physics
thx =)
November 18, 2012

Physics
Evaluate the following as true or false. If the Earth shrank in size, but all other factors remained the same, all of its satellites, including the Moon, would fly off into space. a) True b) False
November 18, 2012

Chemistry
n >1 && l >= 2
October 29, 2012

accounting
Lisa school supplies suffred a fire loss. The company needs to estimate the cost of good destroyed. Beginning inventory was 100,000 purchases totaled 600,000 and sales came equaled 1,000,000. Lisa normal gross profit percentage is 40%. What is the estimated cost of the ...
October 12, 2012

chemistry
According to molecular view, kinetic energy, what happens when 2 tablespoons each of water, methylated spirit and petrol are put in an open container separately in relation to time and the rate of vaporisation?
April 26, 2012

chemistry
According to molecular view, kinetic energy, what happens when 2 tablespoons each of water, methylated spirit and petrol are put in an open container separately in relation to time and the rate of vaporisation?
April 26, 2012

chemistry
According to molecular view, kinetic energy, what happens when 2 tablespoons each of water, methylated spirit and petrol are put in an open container separately in relation to time and the rate of vaporisation?
April 26, 2012

Pre-Calc
Find the values of the trigonometric functions of è from the information given. (sin è, cos è, csc è, sec è, cot è) tan è = −2, sin è > 0
March 24, 2012

pre-calc
Find the area of a triangle with sides of length 5 and 8 and included angle 74°. (Round your answer to one decimal place.)
March 24, 2012

math
Which type of graph is best suited for displaying the number of hours spent studying by students in different age ranges?
March 9, 2012

Trigonometry
What representations do not change the location of the given point (7,140°)?
January 29, 2012

Trigonometry
What representations do not change the location of the given point (7,140°)?
January 29, 2012

psychology
Psychology
November 14, 2011

calculus
Find .... Tan^3(xy^2+y)=x Use derivative
October 30, 2011

calculus
Tan^3(xy^2+y)=x Use derivative
October 30, 2011

Calculus
An ice cube is melting such that the side of the cube is decreasing at the rate of 1/4 t^2 cm / min. It is given that the side of the cube is 8cm at the start of the experiment. Calculate the length of the side of the cube when t = 4? ( answer 2 2/3 cm)
October 22, 2011

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