There are several different methods for finding the slope of a line depending on the information given. In your own words, pleas
1 answer:
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Answer:
0.0359
Step-by-step explanation:
Data provided:
mean values of three independent times are 15, 30, and 20 minutes
the standard deviations are 2, 1, and 1.6 minutes
Now,
New Mean = 15 + 30 + 25 = 65
Variance = ( standard deviation )²
or
Variance = 2² + 1² + 1.6² = 7.56
therefore,
Standard deviation = √variance
or
Standard deviation = 2.75
Thus,
Z-value =
or
Z-value = - 1.81
from the Z-table
the Probability of Z ≤ -1.81 = 0.0359
Answer:
h(t) = 4.68 seconds
Step-by-step explanation:
The function that represents the height of each firework in feet is :
.....(1)
We need to find the time the fireworks take to reach their maximum height. For maximum height,
dh/dt = 0
So,
Put t = 4.68 in equation (1).
So, the fireworks will take 4.68 seconds to their maximum height.