Answer:
48 mL 5% vinegar, 192 mL 15% vinegar
Step-by-step explanation:
If x is volume of 5% vinegar, and y is volume of 15% vinegar, then:
x + y = 240
0.05 x + 0.15 y = 0.13 (240)
Solve with substitution:
0.05 x + 0.15 (240 − x) = 0.13 (240)
0.05 x + 36 − 0.15 x = 31.2
0.10 x = 4.8
x = 48
y = 192
73.214285714285714285714285714286 (or 73 rounded down)
76, 66, 55, 80, 80, 72, 97, 70, 80, 72, 88, 50, 63, 76
76 + 66 + 55 + 80 + 80 + 72 + 97 + 70 + 80 + 72 + 88 + 50 + 63 + 76 = 1025
1025/14 = 73.214285714285714285714285714286
73.214285714285714285714285714286 ≅ 73
5.50 years
A = P
A = final amount
P = initial principal balance
r = interest rate
n = number of times interest applied per time period
t = number of time periods elapsed
3178 = 2000(1+.086/2)^2t
t = 5.499904413
On August 5, 1861, President Lincoln imposes the first federal income tax by signing the Revenue Act. Strapped for cash with which to pursue the Civil War, Lincoln and Congress agreed to impose a 3 percent tax on annual incomes over $800.