Historically, a certain region has experienced 65 thunder days annually. (a "thunder day" is day on which at least one instance of thunder is audible to a normal human ear). over the past eleven years, the mean number of thunder days is 55 with a standard deviation of 20. can you conclude that the mean number of thunder days is less than 65?

18a

step-by-step explanation:

simply because it is. it's the highest common factor

answer: bea's uncle is 25 years old.

step-by-step explanation:

given the equation , we can say that the variable "x" represents the age of bea's uncle. then to find his age, we need to solve for "x":

we must add 15 to both sides of the equation:

now we need to divide both sides of the equation by 3:

therefore, we can conclude that bea's uncle is 25 years old.