Answer:
20%
Step-by-step explanation:
<u><em>(The Explanation):</em></u> What we are given is that the car drives 45 miles each hour. Furthermore, you need to multiply the amount of hours desired to the miles to get a total mile.
<u><em>(Step-By-Step Instructions):</em></u>
<em>45(4) and 45(20) </em> Multiply
<u><em>The Answers:</em></u> 4 hours = 180 miles / 20 hours = 900 miles
Answer:
-4
Step-by-step explanation:
(a) If
are mutually exclusive, then

so we have

(b) If
are mutually independent, then




so that


