Please help me!
Find fg(7) if f(x) = x + 4; D = {Reals} and g(x) = x^2 + 4; D = {Positive integers}. Is 583 correct?

Ineed me i stuck and i don’t want to get it wrong

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

(c) a vine called the mile-a-minute weed is known for growing at a very fast rate. it can grow up to 0.5 ft per day. how fast in inches per hour can the mile-a-minute weed grow up to? show your work using the correct conversion factors.