Suzanna wants to measure a board, but she doesn't have a ruler to measure with. however, she does have several copies of a book that she knows is 17 centimeters tall. a. suzanna lays the books end to end and finds that the board is the same length as 21 books. how many cenimeters long is the board?

Board is 357 cm long.

Step-by-step explanation:

Since we have given that

Suzanna wants to measure a board but she doesn't have a ruler to measure with,So she has several copies of a book that she knows is 17 cm tall where She lays the books end to end to find the length of board which is the same  length as  21 books.

So,

Number of books = 21

Length of board of each book = 17 cm

According to question, we need to find the length of board for 21 books:

Length of board is given by

Hence, Board is 357 cm long.

if a = 1,   and b = 2, then the answer is 47.99999999. if you round that to the nearest whole number, the answer is 48.

the 3rd on is correct

step-by-step explanation: