Answer:
D.6
Step-by-step explanation:
apex
10*40
80*5
20*20
20*20=400
80*5=400
10*40=400
Answer: 7
if Martha jarred 6 liters of jam in 2 days,
she will jarred 3 litters of jam in one day
for 21 litters she will need 7 days
21/3=7
