What prefix should be used to name a hydrocarbon that has an eight-carbon parent chain?

Answer : The prefix used to name a hydrocarbon that has an eight-carbon parent chain should be, Oct-

Explanation :

The prefix used to name a hydrocarbon that has one, two, three, four, five, six, seven, eight, nine and ten carbon parent chain should be, meth-, eth-, prop-, but-, pent-, hex-, sept-, oct-, non- and dec- respectively.

The naming of alkane is done by adding the suffix -ane, alkene by adding the suffix -ene, alkyne by adding the suffix -yne and carboxylic acid by adding the suffix -oic acid.

If two or more similar alkyl groups are present in a compound, the words di-, tri-, tetra- and so on are used to specify the number of times of the alkyl groups in the chain.

Hence, the prefix used to name a hydrocarbon that has an eight-carbon parent chain should be, Oct-

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.

the answer is a! (2.9 x 10^-18 j) hope i could someone. : )