An investment earning interest at the rate of 10%, compounded continuously, will double in t years. find t. use the formula , where is the amount after t years, is the initial amount, r is the rate of interest, and t is the time. t = years.

I have attached the formula solved for years (or time).

We'll say principal = 100 and total = 200

Years = ln (200 / 100) / .1

Years = ln (2) / .1

Years = 0.69314718056 / .1

Years = 6.9314718056

Step-by-step explanation:

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.