Suppose i start with $7,800 and i want to have $18,400 twenty years from now. what interest rate do i need (comp yearly)?

$7,800 + 20x = $18,400 can be used to solve this equation, when x is the amount needed per year.

7800 - 7800 + 20x = 18400 - 7800.

20x = 10600. You would need 10,600 over 20 years but, how much would you need per year?

Well 20x/20 = x and 10,600/20 = 530

x = 530. You would need an interest of $530 yearly

side xy = 10

sin(x) = 4/5

cos(x) = 3/5

tan(x) = 4/3

step-by-step explanation:

idk

step-by-step explanation:

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