A refrigerator should be set at 38°F with an allowance for 2°. a. Write an equation to find the maximum and minimum temperatures at which the refrigerator should be set.

b. Solve the equation to find the maximum and minimum temperatures at which the refrigerator should be set.

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Marco is studying a type of mold that grows at a fast rate. he created the function f(x) = 345(1.30)x to model the number of mold spores per week. what does the 1.30 represent? how many mold spores are there after 4 weeks? round your answer to the nearest whole number. 1.30 represents the number of mold spores marco had at the beginning of the study; 985 mold spores 1.30 represents the number of mold spores grown in a given week; 448 mold spores 1.30 represents the 30% rate of weekly growth; 345 mold spores 1.30 represents the 30% rate of weekly growth; 985 mold spores

Given abcd ac=38 and ae=3x+4 find the value of x