Answer:
At 1.5 seconds and 2.5 seconds
Step-by-step explanation:
Because this is parabolic motion, the object will reach the height of 68 feet when it's going up AND when it's coming down. In order to find out those times, you set the h on the left side of the equation equal to 68, because h stands for height.
Set that equal to 0 and factor to solve for t:
Using the quadratic formula, we get t = 1.5 and t = 2.5
Answer:
D: 216 E: 2038
Step-by-step explanation:
For D:
P= - 55/4 × t + 340
Substitute in for t (2022-2013=9)
-55/4 × 9 = - 123.75
-123.75+340= 216.25
Round down to 216
For E:
The owl population =0
0=-55/4×t+340
-340=-55/4 × t
-340÷-55/4=t
T=24.7272
Round to 25
25+2013 =2038
The average score is 500 points and the standard deviation is 50 points.Mean - 2 SD = 500 - 2 * 50 = 500 - 100 = 400It means that more than 400 on the standardized test is more than: Mean - 2 Standard deviations.For the Normal distribution: 100% - 2.5 % = 97.5% = 0.975.Answer: The probability that student scores more than 400 points is 0.975.
Answer:
98.4252 is the answer :)
Step-by-step explanation:
