PLEASE HELP A S A P . If the Mamba roller coaster at worlds of fun speeds up from 10 mph to 78 mph in 2s. What is the acceleration?

The structure of a dna molecule is best described as a. one long strand of nucleic acids b. two strands of dna nucleotides joined by hydrogen bonds c. two strands of amino acids joined by hydrogen bonds d. one long strand of amino acids