Given: two concentric circles with center point p. how many tangent lines can be drawn that both circles share?

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

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?