These are the first six terms of a sequence with a1=3 and a2=1: 3, 1, 8, 18, 52, 140, … Find a recursive formula for this sequence that is valid for n>2. Write your answer in the simplest form.

Anew test for ra is being developed. the test is administered to 750 patients with ra and 750 without ra. for the sake of the question, assume the prevalence of ra in this population is 50%. of the 750 patients with ra, 575 have a positive result. of the 750 patients without ra, 150 have a positive result. what is the positive predictive value of the new test? a575/(575+150) b. 600/(600+ 150) c. 575/(575+125) d. 600/(600+ 125)

Mr. t has been dating his girlfriend for one year nine months and six days how many hours has mr. t been in a relationship

Round the number to the hundredths place. 26,379.87492 a. 26,379.87 b. 26,379.88 c. 26,380 d. 26,400