Shortcut trick for finding square of hard number​

Need to increase the numbers of customers i talk to daily by 20% how many customers do i need to talk to if i talk to a average of 8 customers per hour during an 8 hour shift

What is the perimeter of square abcd? units units 28 units 37 units

Find the value. a. 0.003 b. 0.03 c. 0.3 d. 3