Let k be a body body and s ⊂k [x], deg (f)> 0 ∀f ∈s. let l1 and l2 be decomposition bodies of s. seiσ: l1 → l2 is a k homomorphism, i. a body homomorphism.

what is the meaning of f here ? what is the meaning of s here ? what is the meaning of l1 here?

45 is the correct answer

The boat's velocity relative to the riverbank can be resolved into two components. the component going north is 2.7 m/s and the component going west is 1.2 m/s.we add these two vectors and then find the magnitude of the resultant to get the speed.the magnitude of the resultant vector from adding can be obtained by the pythagorean theorem.    to two significant figures, the boat's speed relative to the riverbank is 3.0 m/s.