Solution:
we are given that
Dan borrowed $750.00(=P) from his brother who is charging him 8% (=r)simple interest.
Dan pays his brother back in 6 months(=t).
we have been asked to find- how much does he have to pay back including the interest?
As we know that

Substitute the values we get

Hence net payable amount is 750+30=$780
2.8 quintillion^8= 3.77802e+147
3.7 billion^12= 6.582952e+114
3.77802e+147/6.582952e+114=
=5.739097e+32
question 1: you must set the equation to 0 in order to solve the quadratic equation
It's 1/7 e 7 x. the seven and the x are exponents.