Professor Perez used a spreadsheet to compile the data shown. Which value best approximates the correlation coefficient of the data? Hours spent studying: 0 0 1 2 3 5 5 8 Exam score: 61 92 67 64 75 73 82 90

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

If 20% of a number is 35, what is 50% of that number?

Evaluate the expression for the given value of the variable 7a - 4a for a =8