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find a unit vector in the same direction as the vector (-4,7)

Explanation:

Compute the magnitude:

∣∣→a∣∣=√(−10)2+62+(−7)2

∣∣→a∣∣=√100+36+49

∣∣→a∣∣=√185

To obtain the unit vector of →a=(−10,6,−7), we divide each component by √185 but we should rationalize 1√185 to √185185:

ˆa=(−10√185185,6√185185,−7√185185)

Step-by-step explanation:

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stops on an even number.

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour