A) Interest = principal * rate * time
I = (800)(0.05)(3) = $120
b) $800 + $120 = $920 after the three years. $920 * (1 - 0.02) = $901.60.
Answer:

Step-by-step explanation:
We can see the fractions
and
of cups.
It can be seen that denominator has 4 i.e. the fraction
.
Let us suppose, a unit is equal to
of a cup.
Susan was supposed to use
of a cup.
i.e. 5 units of butter was to be used.
But, actual recipe has only 3 units of butter.

a. 
Alternatively, we could have directly divided the given fractions:

24 is the answer. Because you have to multiply first then add.
A. 4 carrots/2 cups of water
You divide to find the amount of carrots for 1 cup.