I'm completly math stupid. My math professor is a total idiot and I'm not learnign anything. I have 2 math problems I don't know how to solve.
Can anyone help?
Here are the problems:
#1
1/r=210/1050+70/1050+30/1050+21/1050
Which would mean
1/r=331/1050
right?
But now what?
#2
9.717 * 18 to the 8th power * 5.78 * 10 to the 12th power /1 lightyear * 1km/0.612mi
The exact problem states A distant star is 9.717 *10 to the 8th light years away from earth. If 1 light year is 5.87*10 to the 12th miles, how many kilometers is the star from earth? Report answer in standard form. Use 1km=0.6214mi.
I think I set up the problem right, but I just don't know how to work eitherr of them.
Can anyone help please?


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