Which of the following is the total number of pennies in rows 1-4 (the first 32 squares)

a)2^32-1
b)2^32
c)2^32+1

Damon makes 20 cups of lemonade by mixing lemon juice and water. the ratio of lemon juice to water is shown in the tape diagram. lemon juice\text{lemon juice} lemon juice water\text{water} water how much lemon juice did damon use in the lemonade? cups