Answer:
The question and choices are cut off, could you repost it?
Step-by-step explanation:
Answer:
u =2
Step-by-step explanation:
5u=18-4u
Add 4u to each side
5u+4u=18-4u+4u
9u = 18
Divide each side by 9
9u/9 = 18/9
u =2
Check the picture below.
make sure your calculator is in Degree mode.
Answer:
The answer is 
Step-by-step explanation:
when writing scientific notation, there must be one number to the left of the decimal point.
To achieve this in this problem, you need to move the decimal point 3 times to the right.
because you are moving the point to the right, the exponent will be negative.
*rule of thumb: moving the decimal to the left will give you a positive exponent, moving to the right will give you a negative exponent*
therefore you answer should be written as:

hope this helps :)
Both are infinity, there is more to the question, they are never like that. There is always an equation not an expression. I need the whole thing.