Asmall garden shop must decide the number of christmas trees to stock for the upcoming holiday season. from past years, they know that the number of trees demanded will be either 30 or 45 with probabilities of 0.5 each. if they order 30 trees, they will make a profit of $900, regardless of the number of trees demanded. if they order 45 trees, and only 30 are demanded, they will have leftover trees, and their profit will be only $600. on the other hand, if they order 45 trees and 45 are demanded, their profit will be $1350. if they order 45 trees, the expected value of profit will be $ (enter your response as an integer.)

One investigating company tracked all credit card purchase during 2012 and measured two variables: (1) the type of credit card used (visa, mastercard, american express, or discover), and (2) the amount (in dollars) of each purchase. identify the level of each variable measured.

Suppose someone wants to sell a piece of land for cash. the selling of a piece of land represents turning

Cool beans is a locally owned coffee shop that competes with two large coffee chains, planeteuro and frothies. alicia, the owner, hired two students to count the number of customers that entered each of the coffee shops to estimate what percent of people who are interested in coffee are visiting each shop. after a week, the students found the following results: 589 visited cool beans, 839 visited planeteuro, and 1,290 visited frothies. the students were surprised that cool beans had 139 visits on monday which represented 59% of all people who visited one of the three coffee shops on mondays. how many people visited one of the three coffee shops during the week?