Hassan's backyard swimming pool is 30 feet long, 20 feet wide, and 5 feet deep. there are 7.5 gallons of water in 1 cubic foot.
1 answer:
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Answer:
I believe the answer is C. 90 degrees
Step-by-step explanation:
First you find the lengths of the two vectors, which are both . Then you find the angle given the cos using: cos(∅)=
=
= 0. Then using ∅=acos(0)=
= 90°