Can someone check my grammar? will give

"it gives viewers a much deeper insight as to just how important automobiles were during this specific time period; the ‘20s.".

i put a semicolon right before after the word "period" but i am unsure as to whether that is the correct punctuation to use. can anyone ?

Yes, the semi colon is fine. The one thing I would suggest changing, is where you said "much deeper", 'much' is not needed.

Explanation:

"It gives viewers a deeper insight as to just how important automobiles were during this specific time period; the ‘20s."

'Deeper' alone makes more sense than 'much deeper", it also sounds better than it did before. Hope this helps :)

we know that, volume of a rectangular prism is given by :

✿   {length × width × height}

given : the length of rectangular prism = 5.5

given : the width of rectangular prism = 6

given : the height of rectangular prism = 3

⇒ the volume of given rectangular prism = {5.5 × 6 × 3}

⇒ the volume of given rectangular prism = 99

is this multiple choice?