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How do stars form?

A star is formed from a nebulae, which is a cloud of dust and gas. The dust and gas particles are drawn together by the gravitational attraction between them. As the nebulae contracts, the dust and gas pa...

SS
Answered by Stephen S. Physics tutor
2077 Views

Show the sum from n=0 to 200 of x^n given that x is not 1, is (1-x^201)/(1-x) hence find the sum of 1+2(1/2)+3(1/2)^2+...+200(1/2)^199

Let the first term of a geometric progression be 'A', define the geometric sum, which we will call 'S', of 'Ax^n' for each integer n to be the sum from n=0 to r of 'Ax^n'. Hence S=A+Ax+Ax^2+...+Ax^r. Cons...

JB
Answered by Jordan B. Maths tutor
3038 Views

Do you agree with abortion? What are the ethical issues here?

Start by acknowledging that this is a complex issue with two sides and lots of shades of grey. Then walk through both in a balanced way, showing an appreciated of the four pillars of ethics.Is it legal? U...

JL
1958 Views

How do i find 30% of 70?

To begin with we need to understand what a percentage is. It is simply a proportional that shows a number as parts of a hundred. So 30% is the same as saying 30/100 which can be simplified by dividing the...

KR
Answered by Kevin R. Maths tutor
135621 Views

What is the difference between sentirse and sentir?

Both sentirse and sentir mean to feel, but aren't used interchangeably. Sentirse is used to describe how you feel, and is followed by and adjective

EH
Answered by Eva H. Spanish tutor
7041 Views

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