The height of a helicopter above the ground is given by h = 2.95t3, where h is in meters and t is in seconds. at t = 1.95 s, the helicopter releases a small mailbag. how long after its release does the mailbag reach the ground?

Ithink the answer is d

How is it possible that phylogenies based on sequences from nuclear genomes and organellar genomes (i.e., chloroplasts and mitochondria) from the same group of species yield phylogenetic trees with different branching orders?   answer :   the genome of the endosymbiont is more closely related to members of the group in which it originally evolved, while the nuclear genome of the engulfing organism has its own evolutionary trajectory.