If the simple interest on $4,000 for 7 years is $1,400

$5400

im assuming you want the total cost?

4000+1400=5400

Step-by-step explanation:

Simple interest is

I=Prt where P= principle, r=rate, t=time

r=I/(Pt)

r=1400/(4000(7))

r=0.05

r=5%

logv3(x+2)=1

rewrite in exponential form:

logb(x) = y is equal to b^y =x

b = 3, y = 1

now solve for x:

3^1 = x+2)

x = 3-2

x = 1

see the picture for the graph.