Two similar triangles have a scale factor of 4:5.

#1. what is the ratio of their perimeters?
#2. what is the ratio of their areas?

please help, K12 can't do their job well and now I have to teach myself everything practically. if you could explain how I go about figuring out this problem that would really be appreciated.

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.)