Need help please asap

What is the largest decimal number that can be represented by a binary number with 4 place values? (remember, each place in a binary number has a value of a power of 2, starting in the ones place with 20.)

Today is the anniversary of me being on yet, i don't need it anymore! here's a picture of my dog wearing a bowtie! my question is, how do i delete my account?

The great length of north america causes the climate to be varied. true false