Answer:
$12.25
Explanation:
since marvill would be paid $1.75 per an hour walk
then multiply the time he use to walk and the money involved for every hour,
12.25 Marvil got $12.75.
1.75
× 7
____
12.25
B. 18 to 26%
The efficiency is low because most of the energy is lost when food energy is converted into ATP