How long does grass take to grow (just curious)

between 7 and 30 days

Explanation:

that's what goo.gle said

HAHAHAHHAHAHA between 7 and 30 days around that depending on the environment and stuff

radiative zone

explanation    

radiative zone is the layer of the sun which energy is transferred away from the core by radiation. although, the core is the only part of the sun that produces an appreciable amount of heat through fusion. in fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius.