They always try to trick you with this. Remember anything 5 or above would round up, anything 4 and under would round down. So look for the tenth place. that's the 9. The number to the right is 8 which is greater than 5. That means round up. You can't round it to 0.1 because that takes it back down. So you just move it over. The answer is 1.0.
The mean is when you add up all the numbers and divide by the amount of numbers there are.
143+312+41+28+308+619+321+352+465=2589
2589/9=287.666666667
round to the whole number you get
288
So first you need to find the surface area of the cake pan in the recipe:
9 times 11 + (9 times 2)2 + (2 times 11)2=99+36+44 which you can figure out yourself.
The second one is:
10 times 10+(10 times 10)2+(10 times 2)2= 100+200+40 which you can also figure out yourself.
I am guessing you cannot use the pan you have for your recipe.
