ilovepizza547

Factor is to get \((x-5)(x-15)(x^2-20x+125) \) which has solutions of \(x=5,x=15,x=10-5i,x=10+5i\)

Complementary counting gets 1-(1/2)^4 (probabilty all are odd) = 15/16

Sum = 2: 1,1

Sum = 3: 1,2 or 2,1

Total: 36

So 3/36 or 1/12

(1/2)^6 = 1/64

\(4x^6+4x^3+1+7x^4-5x^3-6x-2 = 4x^6+7x^4-x^3-6x-1\)

Probabilty of none: \(\frac67 *\frac78 * \frac 89 * \frac{9}{10} = 0.6\)

So probabilty of at least 1 is 0.4 or 2/5

Equation of line: y=0.5x+2

x intercept: x=-4

y intercept: y=2

so the area is 4

Hint: Use the pigeonhole principle with mod 12.

So, I think parameter has to deal with the entire population, but statistic is to do with the sample? If that is right, then 

A. It is surveyed so this is a sample, which means it is a statistic

B. Also a survey, so statistic.

C. Same as B, so statistic

D. This is across the entire district so parameter.

We can simply use the pythagorean theorem to get \(\sqrt{13^2-12^2} = 5.\)