Factor completely 4x2 − 8x − 60 show steps

Pls! does anybody know a shortcut for answering these types of questions in the future?

A. use the formula for continuous compounding with the original example: $1000 invested at 2% for 1 year. record the amount to 5 decimal places. use a calculator. b. compare it to the result using the original compound interest formula with n = 365 calculated to 5 decimal places. which has a larger value? explain.

Which number line correctly shows 0.8 + 0.3?