In which type of triangle is the orthcenter on the perimeter of the triangle

What is the 12th term of b(n)=-4-2(n-1)

Asix-sided die of unknown bias is rolled 20 times, and the number 3 comes up 6 times. in the next three rounds (the die is rolled 20 times in each round), the number 3 comes up 6 times, 5 times, and 7 times. the experimental probability of rolling a 3 is 10 %, which is approximately % more than its theoretical probability. (round off your answers to the nearest integer.)

What is the total surface area of the square pyramid