Step-by-step explanation:
Identity the variable:
Initial Velocity is 35.
Initial Height is 204
Final Height is 0.
What looking for the time.
So we have

Use Quadratic Formula,

A is -16, B is 35 , C is 204.
So we have




The positve solution is

So the answer is 4.83 seconds
Answer: About 99.7% of sixth-grade students will have
heights between <u>51.1</u> inches and <u>64.9</u> inches.
Step-by-step explanation:
According to the empirical rule, 99.7% of data falls within the three standard deviations from the mean.
Given : Mean: 
Standard deviation:= 
Then, the 99.7% of sixth-grade students will have heights between
inches and
inches
i.e.
inches and
inches
i.e. 51.1 inches and 64.9 inches.
I believe 50% of 284 =<em>142</em>
Answer:

Step-by-step explanation:
