My sister step by step show work so she can understand because i forgot how to do this stuff

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

The triangle shown has a hypotenuse with a length of 13 feet. the measure of angle a is 20 degrees. and the measure of angle b is 70 degrees. which of the following is closest to the length, in feet, of line segment ac? no need to use a calculator to find the trig numbers. each function is listed below. 4.4 5 12.2 35.7

Asequence is a function whose is the set of natural numbers