Someone pls help me ill give out brainliest pls don’t answer if you don’t know

William invested $5000 in an account that earns 3.8% interest, compounded annually. the formula for compound interest is a(t) = p(1 + i)t. how much did william have in the account after 6 years? (apex)

Roger could feed 5 walruses with 4 kilograms of fish. how many walruses could he feed with 7.2 kilograms of fish?

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)