Evaluate the expression when c= -5 and d = 2

a -4
b 76
c -16
d -32

Can someone tell me if this is perpendicular? !

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air

Me its important ! marge runs an ice cream parlor. her speciality is triple chocolate sundaes. she can prepare 1 sundae every 2 minutes, and she earns $1.20 for each sundae she makes . if she just makes sundaes for a single shift of at most 4 hours and at least 2 hours , which function relates her earnings to the number of minutes she works?