Answer:
a.) y= 25 + 5x
b.) 45$
Step-by-step explanation:
25$ from the start and adds 5 for extra
y= 25+5(4)
y=25+20
y=45$
(2×10⁴)+(7×10⁵)-(6×10³)= 714000
0.407 because in the others 7 comes before the 0
