Just number 1- please help! thank you!!

Step-by-step explanation:

For no.1

sloution,

for small

Area(A1)=?

now,

A = π r²

A=3.14*2.5^2

A=19.6

A1=19.6cm^2

For,big square

L=10cm

A2=?

now,

A=L^2

A=10^2

A=100

A2=100cm^2

For shaded area

A=A2-A1

A=100-19.6

A=80.4cm^2

2,160 π

step-by-step explanation:

one fourth of 9% = 2.25%

gavin is correct in saying : the equivalent quarterly interest rate would be

2.25%.