The explicit rule for a sequence is given. an 4n - 1 What is the recursive rule for the sequence? O a1= 3; an = an-1 + 4
O a1 = 3; an = an-1 - 1
O a1 = 4; an = an-1 - 1
O a1 = -1; an = an-1 + 4​

Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective

Either enter an exact answer in terms of \piπ or use 3.143.14 for \piπ and enter your answer as a decimal.

These dots plots show the height (in feet) from a sample of the different types of elephants