The feet of a commemorative parabolic steel arch 100m high are 200m apart. determine whether the focus of the arch is above or below ground and indicate the number of feet it lies above or below ground. 75 ft above 25 ft above 25 ft below 75 ft below

1c) the number 131 is a term in the sequence defined by the explicit rule f(n)=5n-4. which term in the sequence is 131? 2a) write the first four terms of the function f(n)=n^2-1 2b) what is the 10th term of the sequence defined by the explicit rule f(n)=n^2-1 2c) the number 224 is a term in the sequence defined by the explicit rule f(n)=n^2-1. which term in the sequence is 224?