Can someone help me for this question? Why I got wrong answer. ASAP!!!

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

Danielle earns a 7.25% commission on everything she sells at the electronics store where she works. she also earns a base salary of $750 per week. what were her sales last week if her total earnings for the week were $1,076.25?

17 in long 1.3 ft wide and 8in high what is the volume