Iam a number. i am the sum of 2^2 and 6^2. what number am i?

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

Mrs.sling bought a pound of green beans for $1.80. how much will mrs.tennison pay for 3 1/2 pounds of green beans?

The volume of the a sphere whoes diameter is 18 cm is cubic cm . if it's diameter were reduced by half, it's volume would be of its original volume