Question

pls answer this one

Answer 1

Answer:

the radius diminished is: r-(10/100*r)=9r/10

Theredore new area is π*(9r/10)^2

change in area is π(r-9r/10)^2

therefore percentage change is:

πr/10πr*100

answer is 10 percent

Answer 2

Step-by-step explanation:

b (19%)

here's a detailed explanation of the answer