A book publisher publishes both fiction and nonfiction books. Let F represent the number of words, per chapter, for fiction books, and let N represent the number of words, per chapter, for nonfiction books. The standard deviation of
the total amount, S = F+N, is 195.3 words. What is the interpretation of this value?
The mean number of words per chapter will vary from book to book.
On average, there are 195.3 words total in a typical chapter of either genre of book.
O This publisher can expect the total number of words per chapter to vary by approximately 195.3 words from the
mean.
O If we combine the fiction and nonfiction books from this publisher, the average number of words per chapter will
change by 195.3.

let's cover over the formula of the vertex:

y = a(x – h)^2 + k

in this formula, (h,k) are the vertex, always remember that the positive or negative value of the vertex is based on the sign it has.

for example, if the vertex is -3,-6 then both the x and y value would have the positive sign attached to it and if it were a positive x and y value, then a negative sign would be attached to it.

with that being said, for our problem the x value is a positive one so we are looking for a number with a negative sign next to it, in this case the first and second choice.

however, for the first answer choice it isn't quite part of the formula so we know that the answer choice correctly displays the x value.

to confirm, we can see if the -1 fits correctly with the second answer choice, and as mentioned above a negative number will have a positive sign attached to it. so, for our problem we can see that -1 has been changed to +1, so we can confirm that the second answer choice is correct.

hence, our final answer is y=(x - 1)^2 + 1

its an acute right triangle

step-by-step explanation: