A certain computer can perform 10 to the 5th power calculations per second. How many calculations can it perform in 10 seconds?

Well, first, 10 to the 5th power is 100,000. So, it can calculate 100,000 per second. The question asks how many calculations can it perform in 10 seconds, so you are going to do 100,000x10. Your answer should be 1,000,000. So, it can calculate 1,000,000 in 10 seconds!