Danny sails a boat downstream. the wind pushes the boat along at 21 km/hr. the current runs downstream at 15 km/hr. what is the actual velocity of the boat?

a) 6.0 km/hr, downstream
b) 1.4 km/hr, downstream
c) 310 km/hr, downstream
d) 36 km/hr, downstream

Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.