Andreas invested $1000 in a savings account. after 4 years, the account had earned a total of $112 simple interest without any additional deposits. what was his interest rate?

The formula to figure out Simple Interest is: I = PRT. Since this question is asking you to find the interest rate, you just have to rearrange the equation to make R the subject.

> R = I/PT
>> R = 112/1000 x 4 = 0.028 x 100 (find percentage) = 2.8%

The answer is 6 – 4i

Step-by-step explanation:

Complex values:

Have the following format: a + bi

In which a is the real part and b is the complex part.

Addition:

Suppose we are going to add two complex numbers. We add their real parts, and their complex parts separatly.

So

(–4 + i) + (10 – 5i) = (-4 + 10) + i(1-5) = 6 - 4i

The answer is 6 – 4i