exam Maths Puzzle Numerical Ability

A homeowner wishes to insulate her attic with fiberglass insulation to
conserve energy. The insulation comes in 40-cm wide rolls that are cut to fit between
the rafters in the at

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If the perimeter of a rectangular swimming pool is 118 feet, find the length and width when the length is 1/3 of the width plus 7. (Use P=2L+2W) I can not seem to figure out the correct equation. vector operation

if
-> -> _. ->
A= 2i -5j + 6k
->
express A as the product of a magnitude and unit vector

the cordinates of the rocket in flight are unkown.