Activity 3 Solve each problem 1. Suppose an object on a certain planet weighs about thrice of what it would weigh on Earth. How much would a 75 kg astronaut weigh on that planet? 2. The Albay astrodome was set for the Teachers' Day program. The chairs in front of the stage were arranged in 55 columns. If there were 75 chairs in each column, how many chairs were prepared? 3. Suppose the temperature in Mayon Skyline rises 2°C each hour from 5 am. By how many degrees Celsius did the temperature rise at 9 am?​