A rectangular football field is 64 meters wide and 100 maters long. A player runs from one corner of the field in a diagonal lin
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If a polynomial is divisible by 
, then 
is a root of this polynomial.
Here (x-a) is equal to x+2:
So -2 is a root of the polynomial. That means <span>x³-6x²+kx+10</span>=0 for x=-2. Now substitute -2 for x in the equation and solve for k:
Here (x-a) is equal to x+2:
So -2 is a root of the polynomial. That means <span>x³-6x²+kx+10</span>=0 for x=-2. Now substitute -2 for x in the equation and solve for k:
Answer:
Step-by-step explanation:
Given : The speeds of vehicles traveling on a highway are normally distributed .
Standard deviation:
Since , sample size : , which is small sample (n<30) so the test applied here is a t-test.
Degree of freedom=
Sample mean :
Level of significance :
Then , significance level :
Using t-distribution table , Critical value :
The confidence interval for population mean is given by :-
Hence, a 98% confidence interval for the population mean=