Priscilla invests $10,000 in an account that compounds interest continuously and earns 11%. How long will it take for her money to double? Round to the nearest tenth of a year.

Step-by-step explanation:

When the interest compounds continuously, our formula is

If we start with 10000 and are looking for how long, t, it takes to double, we are looking for how long it will take for our account to have 2 times 10000.  That's 20000.  Therefore, our equation is

Divide both sides by 10000 to get

Take the natural log of both sides to "undo" that e:

Again, since ln and e undo each other what we have now is

ln(2) = .11t and

so

t = 6.3 years

ruth is 6 years old

step-by-step explanation:

6 + 24 = 30,   so 6/30 = .2  

if you do 1/5 it also equals .2, so that is the answer.

i believe the answer is the polygon, heptagon.