Find the surface area of a rectangular prism with a height of 6 inches, a width of 7 inches, and a length of 13 inches. a) 338 in2 b) 422 in2 c) 520 in2 d) 1364 in2

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

How many different three-digit numbers can be formed using the digits 1 comma 2 comma 9 comma 6 comma 4 comma 3 comma and 8 without repetition? for example, 664 is not allowed.

If the discriminant if a quadratic equation is 4 which statement describes the roots?