Question

A photocopier will only enlarge an image by 10% each time. Determine how many enlargements it will take for an image to be over twice its original size

Answer 1

2 times

Explanation:

2 times

100=10^x

100^2=10^x

x=2

Answer 2

8 enlargements

Explanation:

Each time image gets enlarged by 10% or 1.1 times

• 1.1^x=2
• x log 1.1 = log 2
• x= log2 / log1.1 = 0.30/0.04 = 7.5 = 8 enlargements