<h2><em><u>Solution</u></em> : </h2>
let the last number be x
we know,

So,





therefore, the last number is 10.
Answer:
It is 6ft
Step-by-step explanation:
The formula is
A= 1/2bh so now you would substitute
39= 1/2(13)h
78= 13h
6=h
Answer:
The length of a pen.
Step-by-step explanation:
A length of a pen is around three inches and is reasonable but all of the others are way too big and can be measured in feet or miles.