Match the number of significant figures to the value or problem. 3 ?. 100 + 5.4​

Find dy/dx using implicit differentiation ln(20+e^xy)=y

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

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)