Mathematics, 28.01.2021 14:00 lenniestreet10

1. Find a • b. a = <7, 4>, b = <3, 5>

A. 41
B. <10, 9>
C. -1
D. <21, 20>

2. Find a • b.
a = 10i + 9j, b = 4i + 3j

A. <40, 27>
B. <14, 12>
C. 67
D. -13

3. Find the angle between the given vectors to the nearest tenth of a degree.
u = <8, 7>, v = <9, 7>

A. -8.3 degrees
B. 1.7 degrees
C. 3.3 degrees
D. 13.3 degrees

4. Determine whether the vectors u and v are parallel, orthogonal, or neither.
u = <10, 6>, v = <9, 5>

A. Orthogonal
B. Parallel
C. Neither

5. Evaluate the expression:
v•w
Given the vectors:
r = <5, -5, 2>; v = <2, -8, -8>; w = <-2, 6, -5>

Answers: 2

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1. Find a • b. a = <7, 4>, b = <3, 5>

A. 41
B. <10, 9>
C....