He will not need to pay a shipping fee because 12*9.75 is more than $100.
2.6 is the aswer.
Why?take the 2 number after the decimal the estimate
the answer on number 14. is ×=3 your welcome now please give me brainlest
Use Pythagorean theorem:
9i-j = sqrt (9^2 - 1^2) = sqrt(81-1) = sqrt80
now divide both terms in V by that:
u = 9/sqrt(80)i - 1/sqrt(80)j
see attached picture: