What was Walter francis's White job

When using the scientific method, what should be the first step? a.) gathering information on the problem. b.) stating the problem. c.) analyzing and interpreting data.

You are given the first four terms of an arithmetic sequence. why might you use a recursive formula? why might you use an explicit formula? under what conditions might a recursive formula be preferred over the explicit formula? under what conditions might an explicit formula be preferred over the recursive formula? pleasss ! sorry if it's a long question: (

What was the code name for the d-day invasion?