Answer:
C
Step-by-step explanation:
Hope this helps :)
Answer:
1821.25
Step-by-step explanation:
= 1821.25
Sample space: H1, H2, H3, H4, T1, T2, T3, T4
All outcomes if the card is three: H3, T3
I was unclear about the last two parts of the question.

Explanation
Step 1
the density of an object is given by:

Step 2
let

Step 3
replace,

I hope this helps you
Answer:
a=3
Step-by-step explanation: