You have to turn 65 into a decimal. That would be .65
They do 39/.65
You should get 60 as your final answer.
1.031, 1.06, 1.306, 1.36
If it helps, when you have something that only goes to the hundredths place, add a 0 to the end.
for example, 1.63= 1.630
The horizontal stretch is the correct answer. A period is the distance on the x-axis that it takes for the tangent or cotangent function to repeat itself. Stretching it out horizontally will lengthen that distance and therefore change the period.
Asset is what I think it is