The answers would be a and then ctell me if you need an explaination
Area of a circle is πr^2.
From this, we can calculate
π*2.5^2
= π*6.25
= 19.625
= 19.6
Yes, a rhombus is a rectangle if it has a similar shape of a square.Hope that helped
Answer:
The substance decays by 7.5% every year
Step-by-step explanation: