Which can be a next step in the construction of an angle with a side on line l that is congruent to ∠abc?

a. use a straightedge to draw a line through points d and f.

b. use a straightedge to draw a line through points b and e.

c. use a straightedge to draw a line through points b and d.

d. use a straightedge to draw a line through points e and f.

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

Can someone me with this problem i don't understand i need

The price of a dozen eggs was $1.63. suppose the price increases m dollars per dozen and then the price decreases $0.12 per dozen. which expression represents the current price of eggs after the two price changes?