At one store a trophy costs $12.50. engraving costs $0.40 per letter. at another store, the same trophy costs $14.75. engraving costs $0.25. how many letters, e, must be engraved for the costs to be them same?

The scatter plot shows the number of animal cells clara examined in a laboratory in different months: plot ordered pairs 1, 20 and 2, 60 and 3,100 and 4, 140 and 5, 180 what is the approximate predicted number of animal cells clara examined in the 9th month?