How long (in years) would $700 have to be invested at 11.9% compounded continuously to earn $300 interest?​

A = Pert is formula for continuously compounded interest

A = final amount = 2000

P = principal = 1000

e = euler's number (on calculator)

r = interest rate as decimal = .075

t = time in years

Your mistake is that 7.5% as a decimal is 7.5/100 = .075

not 7.5

2000 = 1000e.075t

e.075t = 2000/1000

e.075t = 2

take natural log of both sides

ln e.075t = ln 2

.075t = ln 2

t = ln2/.075

t = 9.24 years

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)

the answer will be b x² +x-1

step-by-step explanation: