Answer:
x =
Step-by-step explanation:
Well first you have to isolate x so divide by 3/4 on both sides. when you divide a fraction by another fraction you multiply by the reciprical.(I think i spelled reciprical wrong, tell me if i did) Therefore you must multiply
1/7 by 4/3 giving you 4/21 which is equal to x.
Continuous interest is Pe^(rt), but you are doubling your money in nine years so you want 2P=Pe^9t. Now divide both sides by P so 2=e^9t. Now take the ln of each side so ln2=9t. then just divide by 9. You will get a decimal, so move the decimal two places to the right to get your interest rate.
Each friend will get .6 of the pizza b/c 5 divided by 3 equals .6.