What is your level at school? I want to help you through the answers
Answer:
a. 4/21
b. 4/7
Step-by-step explanation:
Please kindly check the attached files for explanation.
The number that expresses 6.72 as a fraction is simplest form is...
6.72= 168/25

The probability of getting 0 heads in 4 tosses (or equivalently, 4 tails) is

.
So the desired probability is
Answer:
No, middle term should be 40x.
Step-by-step explanation:

Hence, for the given trinomial to be a perfect square its middle term should be 40x and not 36x.