Hi LBJones9339, Welcome to GIMPCHAT!
1. Did you pasted it in it own layer? You should use "Open as Layer" the image, instead of copy and paste.
2. Does it give you an error message when you try to use the "Scale tool"? Maybe you have the "Transform mode" in other than "Layer". Go to the Tool Options and make sure have it in "Layer".
These option explained:
a. Layer - to Scale a whole Layer
b. Selection - to Scale a Selection
c. Path - to Scale Paths
d. Image - to Scale the whole image