Name and write formulas for alkenes, recognize physical properties of alkenes, and identify their isomers question what is true about the bonding in alkenes? select all that apply? select all that apply: the carbon-carbon double bond in an alkene contains one sigma (o) and one pi (1) bond. o the carbon-carbon double bond can freely rotate. o geometric isomers result from a different orientation of atoms in space. o alkanes and alkenes are named identically, including using the "-ane" suffix. feedback more instruction submit content attribution

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.

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

5.6⋅10−^19  j

do you need the explaination?