Answer:
4h+.07s
Step-by-step explanation:
four dollars per hour plus 7 percent of her sales
(a+b)^2+(a-b)^2=2(a^2+b^2)
expanding:
a² + 2ab + b² + a² -2ab + b² = 2a² + 2b²
2a² + 2b² = 2a² + 2b²
ones
63
6=60
3=3
so it is in the ones place