Posts by iman

Total # Posts: 42

chemistry
How many moles of iron atoms are in 22.37 g of iron (II) sulfide, FeS?

Physica
A rocket reises from rest with an acceleration 5m/s^2 until it runs out of fuel at a height of 500 m . The maximum height dose the rocket from the ground reach is?

math
A company makes two products , namely X and Y. Each product must be processed in 3 stages; welding , assembly and painting. Each unit X takes 2 hours in welding, assembling 3 hours and 1 hour in painting. Each unit Y takes 3 hours in welding, 2 hours assembling and 1 hours in ...

math
Peter will apply to his favorite school . Requirement for admission to the school : 1. Indonesian languange score should not be less than 6 , 2. Mathematics score should not be less than 5 3. Score of Indonesian languange + score of mathematics should not be less than 12. ...

math
Please, help me to solve this problems by Cramer's rule Question number : 1. 5/x + 3/y = 19 2/x + 1/y = 7 Question number : 2. log x + 2 log y = 4 2 log x - 3 log y = 1 The Answer for number 1 : D = -1 Dx = -2 Dy = -3 The answer for number 2 : D = -5 Dx = -14 Dy = -3 ...

math
Mr. Steve, thank you very much to answer my question on Sunday, 23 August at 1:44 pm. But please, show me how to get : Number 1 : 1. D = -1 Dx = -2 Dy = -3 Number 2 : 2. D = -5 Dx = -14 Dy = -3 Because the steps to know that is important for me. Please...

math
Please, help me to solve this problems by Cramer rule Question number : 1. 5/x + 3/y = 19 2/x + 1/y = 7 Question number : 2. log x + 2 log y = 4 2 log x - 3 log y = 1 so confuse..

math
A man have 5 trucks. The capacity of trucks A and B are 2,5 ton, trucks C and D are 3 ton and the capacity of truck E is 1 ton more then the average capacities. Identify the capacity of truck E.

math
A and B are numbers. The result of AB is an even number. The result of A+B is uneven number. A = ?, B = ? so confuse..

math
If the product of two numbers is even, and the result is an odd number , what is the numbers ?

math
In a contest , 2 participants were asked about their age . To test the strength of their math , they are asked to add their ages together. One answer 44 and the other gives 1280. The first obtained from the parse age with one another , while the second can multiply both their ...

math
Mr. Kardi have 5 trucks of sand . The charge then A and B are 2.5 ton , trucks C and D 3 ton , 1 ton truck E load over charge - average. How many tons of cargo trucks E ?

math
A television is sold at a discount of 13 % for IDR. 870,000. What is the actual price of the television before at a discount ? COnfuse..

math
A man has been through 24 phases traveling in a motorcycle rally and finish as much as 37.7 % of the way to be traversed . How many phases that must be gone through to complete the 58 % ?

math
In a car repair shop there are 50 cars to be repaired . It is estimated that 23 of that cars need new brakes , and 34 of that cars need to repair the exhaust system . a. How many cars are in need of repair at least two? b . What most cars that are not in need of repair both?

math
The gardener went to the market to buy 100 animals for a total of IDR 1.000.000. If the price of cow IDR. 50,000 /cow and goat IDR 10,000 /goat , rabbit IDR 5000 /rabbit , how many of each kind of animal which can he buy ? I wrote : Cow = X = 50.000 Goat = Y = 10.000 Rabbit = ...

math
1. When 100 students took a test, the average score was 77,1. Two more students took the test, the sum of the score was 125. What is the new average ? 2. The Basket Ball Team and Baseball team have a total of 24 players. There are 12 basket players and 18 baseball players. How...

math
A girl bought some pencils, erasers, and paper clips at the stationery store. The pencils cost IDR. 1000 each, the erasers cost IDR. 500 each and the paper clips cost 2 for IDR. 100. If she bought total cost IDR. 10000, how many of each did she buy ? I wrote : Pencil = X = IDR...

math
A gallon of water weight 8,3 kg. A cubic foot of water weight about 62 Kg. How many gallons of water would fill a cubic foot container ? My answer is 62/8,3 = 7,46 gallons. Is it right ?? Please, help my son.

English
Is this sentence correct? The woman for whom we gave the party was delighted.

English
Is this sentence correct? Between you and I, I think it's wrong.

English
My instructions are to choose the sentence that has the prepositional phrase underlined." part underlined" 1. I didn't want "to trust" her at the beginning. 2. The house "on the hill" was completely destroyed by fire. 3. In the early evening, ...

Chemistry
The specific heat for liquid ethanol is 2.46 J/(g•°C). When 210 g of ethanol is cooled from 50 °C to 5 °C, the surrounding 7.80 × 103 g of air absorbs the heat. The specific heat of air is 1.01J/(g•°C)

Math Perimeter
22

American Gov't
The National Organization of Women, the Christian Coalition, the Sierra Club, and the Club for Growth are all examples of what?

Valedictorian Speech
thanks

Valedictorian Speech
by the way do you like the speech?

Valedictorian Speech
Thank you sooooo much!!!

Valedictorian Speech
I go to an Islamic private school. can you please comment on my speech i don't care you can be as harsh as you want. -------------------------------------------------------------------------------- Can everyone please take out $5? … You know I should get paid for ...

Physics - Kinematics
Need some help with my homework! Question 7 a) Acceleration is the rate of change of velocity Use your definition in (a) to show that v = u + at, where v is the final velocity, u is the initial velocity and a and t are the acceleration and the time interval respectively. State...

Math - Mathematical Induction
3. Prove by induction that∑_(r=1)^n▒〖r(r+4)=1/6 n(n+1)(2n+13)〗. 5. It is given that u_1=1 and u_(n+1)=3u_n+2n-2 where n is a positive integer. Prove, by induction, that u_n=3^n/2-n+1/2. 14. The rth term of a sequence is given by u_r=r(3r+1),r=1,2,3,&#...

calculus
Calculus A, Evaluate the following integral : ç (x^2+3x-2)dx

English
Would I say the Chicago White Sox rules or rule? Why?

Physics
You did everything right. You just need to change the sign at the end. so your answer should be +0.1045 Hope this helps :)

Chemistry
wait are you saying that the object has a mass of 50 grams but its in an environment of 51 ml (volume)?

math
the reciprocal means you flip the fractions numbers. so the denominator would be where the numerator is. right not the fraction is 9/1 but if you flip it you get 1/9 and that's the reciprocal. hope i helped =)

chemistry
by the way the product is CaCO3

chemistry
how do you calculate the aqueous by product produced when you have the mass of the beaker with the product after it dried and it has dried?!?! im so confused

Math
okay so since the whole angle equals 90 degrees that means the angles that are made have to equal 90. so 90 - 30= 60 and that would be the missing angle. hope i helped =)

Physics
A ball is dropped from a roof and takes 3.0 s to reach the ground. Calculate the elevation of the roof above the ground in meters.

Physics
A ball rolls down an incline at a constant acceleration of 2 m/s^2. What is the velocity of the ball after 8.5 s? How far does the ball roll in 10s? How far does the ball roll in the seventh second?

Physics
A person can row a boat at a rate of 25 m/s in still water. The person heads the boat directly across a stream that flows at a rate of 9 m/s. Find the resultant velocity of the boat.