Answer:
Step-by-step explanation:

<em> Given that:</em> 100 copies = $3.10
<em>Find cost of 1 copy:</em>
1 copy = $3.10 ÷ 100 = $0.031
<em>Find the cost of 155 copies: </em>
155 copies = $0.031 x 155 = $4.81 (nearest hundredth)
Answer: $4.81
<h2><em>To enlarge or reduce any shape you must begin by working out the scale factor, this is calculated by using the following formula:
</em></h2><h2><em>
</em></h2><h2><em>For an enlargement = large number ÷ small number
</em></h2><h2><em>
</em></h2><h2><em>For a reduction = small number ÷ large number</em></h2>
Answer: It will still measure the same at 30 degrees.
Step-by-step explanation:
A rotation just changes orientation, not size or measure
Sequence
8 - 7 = 1
15 - 8 = 7
23 - 15 = 8
38 - 23 = 15
For more sequences
38 + 23 = 61
Then
61 + 38 = 99
And so on the sequence continue