Sally's basic cable plan costs $55 a month and an additional $3 for each premium channel. Cable plan B costs $60 and an additional $2.50 for each premium channel. Which plan is
cheaper if Sally wants to order 10 premium channels?

Step-by-step explanation:

Sally is paying $55 + $3×10 = $85 currently

if she switches to plan B the she will pay $60 + $2.50×10 = $85

That shows both of the cable plan costs same for monthly payment + 10 premium channels

square pyramid

step-by-step explanation:

square prism looks like nothing like that

triangular prism has a rectangular base instead of a square base

tetrahedron has a triangular base