# Posts by Kelvin

Total # Posts: 146

**math**

time taken = 10 am - 8 am = 2 hrs distance won't change so Distance = speed multiply time. 50 times 2 =100 km then time taken 100 divide by 40 = 2 hrs 30 min so from 8 am add 2hrs 30min =10:30 am

*February 26, 2017*

**math**

Find the cost of buying 4 dozen of exercise books at sh 6000 per dozen,a half dozen of pencil at sh 2050 per dozen,5 dozen rulers at sh 3600 per dozen #i need anyone to help me please# and in case someone has such type of questions,i am kindly need for practice *Thanks for the...

*February 23, 2017*

**math**

Dallas was given a discount of 10 percent of the following items: 1/1/4 cartons of exercise books @ sh 42000 per cartons,ten cartons of pens sh 22000 each.How much did he pay all together after the discount of 10 percent? *I need anyone to help me please* And in case someone ...

*February 23, 2017*

**math**

Dallas was given a discount of 10 percent of the following items: 1/1/4 cartons of exercise books @ sh 42000 per cartons,ten cartons of pens sh 22000 each.How much did he pay all together after the discount of 10 percent? *I need anyone to help me please* And in case someone ...

*February 22, 2017*

**math**

ms sue thanks for the help in case of questions I searched but I didn't get any so if you have a website or any other sources of such questions may you inform me please

*February 22, 2017*

**math**

Find the cost of buying 4 dozen of exercise books at sh 6000 per dozen,a half dozen of pencil at sh 2050 per dozen,5 dozen rulers at sh 3600 per dozen #i need anyone to help me please# and in case someone know where i can get such the questions,i am kindly need for practice *...

*February 22, 2017*

**math**

can you take 36000 + 480000 after that to fulfill the requirement of questions or it is wrong?? @Anonymous

*February 21, 2017*

**math**

A woman deposited Tsh 480000 in CRBD which charges an interest of 15% per annum.How much did she get after six months?# anyone to help me plz#

*February 21, 2017*

**math sets**

out of 320 students at a university,190 taking math,235 taking chemistry and 120 taking physics.125 are taking both chemistry and math,95 taking both chemistry AND PHYSIC,55 TAKING BOTH MATH AND PHYSICS.HOW MANY ARE TAKING ALL THE THREE SUBJECTS

*January 16, 2017*

**braindrain**

some have more than 100 some none but matiangi has two

*December 16, 2016*

**math**

a boy spends 3/8 of his money on food and 2/5 of the remainder on books, and had $15.how much did he have

*December 12, 2016*

**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*

**English Riddle**

cap

*December 7, 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**

stress=force/Area

*October 1, 2015*

**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*