# 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)

**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.