Cycle 3 Exam 1 Review

​Cycle 3 - Exam 1 Review

By Evan Pratt

Multiple Choice

When you multiply a matrix by the identity matrix, you obtain the

• inverse matrix.

• transpose matrix.

• Identity matrix

• original matrix.

Multiple Choice

In Matrix R (pictured) what element is in the second row, third column?

• 8
• 9.01
• 6
• 1

Multiple Choice

Find B-A

• -3     1
  7     -1
• 1     0
  1     -4
• 4       0
  -6     -1

• not possible because rows do not match columns

Multiple Choice

Can the operation be performed?

• Yes
• No
• Sometimes
• Who knows

Multiple Choice

Express the following in scientific notation:

.000457

• 457 x 10⁶

• 457 x 10^-6

• 4.57 x10⁴

• 4.57 x 10^-4

Multiple Choice

Rewrite log₂8 = 3 in exponential form

• 2⁸ = 3

• 2³ = 8

• 3² = 8

• 8³ = 2

Multiple Choice

log₅125 = ?

• 2

• 3

• 4

Multiple Choice

What is the order of the matrix

• 2x3

• 3x2

• 2x2

• 3x3

Multiple Choice

What is the value of a_25?

• -1

• undefined

• -2

• 1

Multiple Choice

find: BA

• 47     30
  9     5
• 17     15
  42     35
• 10     25
  7     1
• not possible because rows do not match columns