Find all real solutions of the equation, approximating when necessary (hint: answer is not A) x^{3}+4x^{2}+10x+15=0
A) x=2.426
B) x=-2.426
C) x=5.218
D) x=-5.218

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.)