Answer:
A = πr² ← r is the radius and r = \frac{1}{2} d ← d is the diameter
Hence
π (\frac{1}{2} d)² = A, that is
\frac{d^2\pi }{4} = A ( multiply both sides by 4 )
d²π = 4A ( divide both sides by π )
d² = \frac{4A}{\pi } ( take the square root of both sides )
d = \sqrt{\frac{4A}{\pi } }
Hi
60 miles in 1.5 hour mean speed of 60/1.5 = 40
If speed is reduce of 5, then she drive at 35 mph.
so 35*3 = 105 miles in 3 hours.
Answer:
C: 0.25
Step-by-step explanation:
We will use conditional probability formula to solve our given problem.
, where,
= Probability of event B, given probability of event A.
= Probability of event A and event B.
= Probability of event A.
Let us substitute our given values in conditional probability formula.
= Probability that a student plays a sport given that student is a senior.
=The probability that a student is a senior and plays a sport = 0.05.
= Probability that a student is a senior = 0.20.

Therefore, the probability that a randomly selected student plays a sport, given that the student is a senior will be 0.25 and option C is the correct choice.