3. The amount of money a family spends in Florida per week on groceries is normally distributed with a mean of $300 and a standard deviation of 543. Find the following population percentages using v score,
A. Less than $290,
B. More than $300,
C. Between $260 and $360,

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

the answer on ed. is:

c. "the graph of f(x) has exactly two x-intercepts."

hope i could someone! : )