Find the 4th term in the sequence of a(n)=-6-4(n-1)

Jessica is a custodian at oracle arena. she waxes 20 m2 of the floor in 3/5 of an hour. jessica waxes the floor at a constant rate. at this rate how many sqaures meters can she wax per hour

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees