Answer:
Step-by-step explanation:
The application of probability distribution function is employed in solving the question. The detailed analysis and step by step approach is as shown in the attached file.
The 3rd one because the rest you would have to distribute them and for the 3rd one it’s the same
Use Pythagorean's Theorem to find the length of x.

so

and

. We can simplify that radicand down into a perfect square times a prime number, and that is

. 4 is a perfect square that can be pulled out as a 2, so the length of x is

, the choice on the top right.
She originally had $400 in her bank account.
The 50w represents the amount she will put away each week.
I hope that this help 1) x=0.8 2)x=2