You need to purchase enough hamburger buns to make 30 sandwiches. Buns come in packages of 8 or 12, depending on where you shop. Which store offers the better buy for 30 buns?

The focus of parabola is (-4, -5), and its directrix is y= -1. fill in the missing terms and signs in parabolas equation in standard form

Indicate the formula for the following conditions: p^c(n,r)=

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?