Python 7.1.6: Sandwich Sandwiches (codehs)

In this exercise, write a function called sandwich which takes a 3 letter string. Your function should return the letters that are at the beginning and end of the string.

For example,

sandwich("pbj")
# => "pj"
sandwich("blt")
# => "bt"

When building customer relationships through email what should you not do? question 2 options: utilize proper grammar, spelling, and punctuation type in all capital letters use hyperlinks rather than attachments respond to all emails within 24 hours

What is a distinguishing feature of today’s graphic application software?) graphic applications are used today on a variety of devices, including touch-screen kiosks and mobile phones.

For positive constants a and b, the force between two atoms in a molecule is given f(r) = −a r2 + b r3 , where r > 0 is the distance between the atoms. note: a and b are upper case letters. (a) find f '(r) = (b) find the critical point for f(r). r = (c) find f ''(r) = (d) find the value of r so that f ''(r) = 0.