Determine whether the improper integral converges or diverges, and find the value of each that converges.
∫^[infinity]_-[infinity] e^|x| dx

You are at a restaurant and owe $56.20 for your meal. you want to leave an 18% tip. approximately how much is your tip?

Math it's appreciated. (picture provided)

The length of an intercepted arc of a central angle of a circle is 4 cm. if the radius of the circle is 5 cm what is the measurement of the central angle to the nearest whole degree