A dolphin trainer is trying a new trick. He will jump upward from a spring board, through a suspended hula hoop 10 feet
above the water. If he can get an initial leap of 19ft/sec.
a) Should we move the hula hoop up or down, by how much?
b) How long is his hang time (how long is he in the air for?)

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)

127

whether it's diameter, or radius, i believe if i remember correctly from school, every amount has to always add up to 180. so if you take 53, and starting adding, long story short, taking 127 and adding it to 53, gives you 180.

you can use a^2+ b^2=c^2