Answer:

Step-by-step explanation:
-The total volume will be the sum of the volumes of the triangular section plus the rectangular section.
#Volume triangular section:

#Volume rectangular section:

#Total volume of the doorstep:

Hence, the doorstep's volume is 
Answer:
C
Step-by-step explanation:
Answer:
0.60, 2/3, 70%, 3/4, .85
Step-by-step explanation:
Answer:
2/-3
Step-by-step explanation:
Hope this helped. And I know that you can choose more than one, but I'm pretty sure this is the only one that's equivalent to -2/3