Answer before monday 9 a. m.i have to go to school that day at that time.

Explanation:

The plastic pencil case has form of a triangular prism.

This triangular prism has five faces:

Surface area:

        area = (1/2) base × height

         area of one triangle = 10 cm × 12 cm × (1/2) = 60 cm²

          area of the two triangles = 2 × 60 cm² = 120 cm²

        area of a rectangle = length × width

         area of the trhee triangles = 24 cm × 10 cm + 2 × 24 cm × 13 cm = 240 cm² + 624 cm² = 864 cm².

first choice, 984 cm²

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step-by-step explanation:

12.5 feet

step-by-step explanation: