Answer:
its the second answer i hope that helps
Answer:

Step-by-step explanation:
we are given
A student randomly guesses on 10 true/false questions
so,

there only true and false
so, probability getting true question is

so, probability getting false question is

the student gets 5 out of 10 questions right
so,
r=5
we can use binomial probability formula

now, we can plug values

we can simplify it
and we get

Answer:
B
Step-by-step explanation:
If there are 5,280 feet in one mile, multiply that by 7 to get 36,960 ft
The answer to your question is 9 x 9 = 81.