Answer:
A(x) = -2X² + 600X
Step-by-step explanation:
Area = X · Y
Perimeter = 2X + Y = 600
Y = 600 - 2X
A(x) = X · (600 - 2X) = 600X - 2X²
A(x) = -2X² + 600X
if you want to maximize area:
A'(x) = -4X + 600 = 0
600 = 4X
X = 150
Y = 600 - (2 · 150) = 600 - 300 = 300
Area = 150 · 300 = 45,000 ft²
What the other guy said is correct 8761
Answer:
3/4 of a hour
Step-by-step explanation:
2 miles = 0.5 hours
Divide by 2
1 mile = 0.25 hours
Multiply by 3
3 mile = 0.75 hours
A) total $1216.65, interest $216.65
B) total $ 1265.32, interest $ 265.32
C) total $ 1137.64, interest $ 137.64
D) total $ 1154.64, interest $ 154.64