Categorize these measurements associated with fishing according to level: nominal, ordinal, interval, or ratio. (a) Species of fish caught: perch, bass, pike, trout nominal ordinal interval ratio (b) Cost of rod and reel nominal ordinal interval ratio (c) Time of return home nominal ordinal interval ratio (d) Guidebook rating of fishing area: poor, fair, good nominal ordinal interval ratio (e) Number of fish caught nominal ordinal interval ratio (f) Temperature of water nominal ordinal interval ratio

b i think

step-by-step explanation:

not really sure

he has 140 chickens because he has 10 times more chickens than ducks and he has 14 ducks so 14*10=140

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x^2 + 81

we can factor this using difference of square binomials.

rewrite the equation:

x^2 - (-81)

factor:

(a^2 - b^2) = (√a^2 + √b^2)(√a^2 - √b^2)

(x^2 - (-81) = (x + √-81)(x - √-81)

we can remove the - from under the radical by multiplying it by i.

(x^2 - (-81) = (x + i√81)(x - i√81)

(x^2 - (-81) = (x + 9i)(x - 9i)

we can check our answer by using foil:

x^2 - 9ix + 9ix - 81i^2

x^2 - 81^2

i^2 = -1

x^2 + 81