Answer:
A
Step-by-step explanation:
MARK AS BRAINLIEST!!
Answer:
Mary and Duke have 3,172 stamps altogether
1,364 + 1,808 = 3,172
There is 4 1/10's in 2/5.
You do this by turning 2/5 into a fraction with a denominator of 10, so it will be 4/10. 1/10 + 1/10 + 1/10 + 1/10 = 4/10