Which choice correctly shows how to use partial products to find 250
×
15
?

A.
1
,
250
+
150
B.
2
,
500
+
150
C.
1
,
250
+
1
,
250
D.
1
,
250
+
2
,
500

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?