Please help me solve the question ​

Suppose a pendulum is l meters long. the time, t,in seconds that it tales to swing back and forth once is given by t=2.01

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)

When steve woke up. his temperature was 102 degrees f. two hours later it was 3 degrees lower. what was his temperature then?