20 minutes for $3.75 or 35 minutes for $5.25. whats the better deal

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

Enter the number of complex zeros for the polynomial function f(x) = x 4+ 5x² +6

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?