Lucy has $40 in a savings account that earns 10% interest, compounded annually. To the nearest cent, how much interest will she earn in 3 years?

What are the domain and range of f(x)=[1/5]x

Find the length of the following tangent segments to the circles centered at o and o' whose radii are 5 and 3 respectively and the distance between o and o' is 12. what is the tangent segment of cd?

Prove that the sum of two consecutive exponents of the number 5 is divisible by 30.if two consecutive exponents are 5n and 5n + 1, then their sum can be written as 30.