Please help I'm behind

a= -4

Step-by-step explanation:

2^-4 ×2^a =2^-8

2^-4+a = 2^-8

both 2 are cancelled by dividing

then,

-4+a = -8

a = -8+4

a= -4

hope this helps you

9 x 8 divided by (5-3)=36

126.66 m²

step-by-step explanation:

the pertinent area formula is a = πr², where r is the radius.

here, a = π(6.35 m)² = 40.32π, or approximately 126.66 m²