8. The mean of the winning scores of a bowling tournament over the last 10 years was 279, with a standard deviation of 3. Consid
1 answer:
We Answer:
84.134% of the scores
Step-by-step explanation:
-This questions needs as to determine the probability of scores less than 282 then find the expectation;
-Let X be the score of a random selection:
The probability of scores below 282 is 0.84134 or 84.134%
Hence, 84.134% of the scores were below 282
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"how long..." is asking for time (t). "The amount of time spent in the air" is the time from when the ball was kicked (0 seconds) to the time it landed on the ground. Need to find the x-intercepts (one will be negative which will be invalid). You can do this by factoring ... <em>or by using the quadratic formula.</em> With the equation you provided, it is not factorable, so you must use the quadratic formula.
h = -16t² + 60t + 3
a=-16 b=60 c=3
or
or
t = -0.05 or t = 3.8 <em>disregard the negative</em>
Answer: 3.8 seconds
