The retail price of a medium-sized box of a well-known brand of cornflakes ranges from $2.24 to $2.71. assume these prices are uniformly distributed. **(round your answer to 3 decimal places.) ***(round your answer to 4 decimal places.) (a) what is the average price in this distribution? ** (b) what is the standard deviation of prices in this distribution? ** (c) if a price is randomly selected from this list, what is the probability that it will be between $2.35 and $2.44? ***

there are lots of ways.   pick's theorem tells us if the vertices are lattice points the area a is

a = b/2 + i - 1

where b is the number of boundary lattice points and i is the number of interior lattice points.

in the figure i count b=16, i=50 so

a = 8 + 50 - 1 = 57

let's try the shoelace formula.   the area is half the sum of the cross products of the sides.  

a(-2,6)   -2(2)-6(-5) = 26

b(-5,2)   -5(-3) - 2(-2) = 19

c(-2,-3) -2(-3) - (-3)(4) = 18

d(4,-3)   4(3) - (-3)(5) = 27

e(5,3)   5(3) - 3(1) = 12

f(1,3)     1(6) - 3(-2) = 12

a(-2,6)

each of the cross products is twice the area of the triangle with the associated side and one vertex the origin. so the area of abo=26/2=13.

area = (1/2) (26 + 19 +   18 + 27 + 12 + 12) = 57

that checks!

answer: -8.2562234e+13

the answer is b