Determine amount of investment if $400 is invested at a annual interest rate of 7.25% for 7 years round to nearest penny. i'm going to post my formula someone correct me if wrong ?

The answer is $682.80

Step-by-step explanation:

P = $400

rate = 7.25 or 0.0725

time = 7 years

n = 1

Compound interest formula is :

Here n = 1

So, we will simply take

Putting values in the formula we get,

400(1.632) = $652.80

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is