Rosa has a bookshelf where she stores her book collection. four tenths of her books are mystery books. what is this amount written as a decimal?

0.4

Step-by-step explanation:

4/10 is the same as 0.4 because tenths place is one place after the decimal point. So it would be 0.4

$4034.40

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40