Derive the area formula for a triangle

What is the slope of the line shown below?

At the beginning of year 1, carlos invests $600 at an annual compound interest rate of 4%. he makes no deposits to or withdrawals from the account. which explicit formula can be used to find the account's balance at the beginning of year 5? what is, the balance?

Angles 1 and 2 are complimentary angles. angle 1 = 52 degrees. what is the measure of angle 2?