What is the diameter of a circle with a radius of 50

Answer this question! 30 points and brainliest! only if you know the answer.

Sunday: 1 1 2 monday: 1 tuesday: 2 1 2 wednesday: 1 3 4 thursday: 2 friday: 1 1 2 saturday: 2 jenna is a swimmer and trains every day. the schedule shown outlines the number of hours she trains each day. what is the total number of hours that jenna trains during the week?

Prove that 16^4-2^13-4^5 is divisible by 11.