Find the normal approximation to P(355 x 360) for a binomial probability distribution with n

Question:

Find the normal approximation to P(355 ≤ x ≤ 360) for a binomial probability with n = 400 and p = .9.
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...