Respuesta :
Answer:
The interest rate is 0.06%
Explanation:
Step one :
Given data
final amount $1,000
initial principal balance $850
annual interest rate=?
time (in years)=5 years
Step two:
Applying the
Simple interest/Formula
A = P (1 + rt)
A = final amount
P = initial principal balance
r = annual interest rate
t = time (in years)
Plugin our data into the formula We have
1000=850(1+r*5)
1,000=850(1+5r)
Opening bracket we have
1,000=850+4,250r
Colleting like terms we have
1000-850=4250r
250=4,250r
Dividing both sides by 4,250 we have
r=250/4250
r=0.058
Hence the interest rate is 0.06%
Answer:
0.035%
Explanation:
Using the formula for calculating simple interest.
Simple interest = Principal × Rate × Time/100
Since Amount = Principal + Interest
Interest = Amount - Principal
Interest = $1000 - $850
Interest = $150
If time = 5years
Principal = $850
To get the interest rate, we will substitute the given data into the simple interest formula to have;
$150 = ($850×Rate×5)/100
Cross multiplying
$15,000 = 425000×rate
Interest Rate = 15000/425000
Interest rate = 0.035%