Answer: 3.905 rounded
Step-by-step explanation: The thousandth in this number is 4.
Round it up since when its 5 or more you add 1 more/raise the score
The answer is 3.905
Answer:
4
Step-by-step explanation: 5 22 8 18 e
Graph the function and look for sign changes in the slope (easiest)
of the 7 roots 3 are real and 4 are complex
or the perferred way is to apply Descartes rule of signs
x^7-3x^5+4x^2-1=0 a typo in your function attached photos shows 4x²
(x^7) - (3x^5) +(4x^2) - (1) sign changes I see 3
then to find a bound on the number of negative roots
(-x^7) - (-3x^5) +(4x^2) - (1) = -x^7 + 3x^5 + 4x^2 - 1 I see 2 sign changes ??
there is at least 1 real root (due the odd highest power)
and either 0, 2, 4 or 6 complex roots
so 5 and 7 are out
still confused I used a polynomials root calculator
it said ther are three real roots (confirmed by the graph of the function)
and four comple roots (which I can't figure out from the graph)
Answer:
Step-by-step explanation:
levels of organic pollutants with 99.7% accuracy
levels of volatile solvents with 99.92% accuracy
levels of chlorinated compounds with 89.7% accuracy
samples:
60% contaminated with organic pollutants
27% contaminated with volatile solvents
13% contaminated with traces of chlorinated compounds
a) probability that the test will signal?
P = 0.997*0.6 + 0.9992*0.27 + 0.897*0.13 = 0.5982
+ 0.269784 + 0.11661 = 0.984594 = 98.45%
b) If the test signals, the probability that chlorinated compounds are present?
P = 0.897*0.13/0.984594 = 0.11661/0.984594 = 0.1184346035 = 11.84%
Answer:
117 degrees
Step-by-step explanation:
