In the right △abc, cd is the altitude to the hypotenuse ab and m∠abc=30°. find ad, if bd=54 cm.

A) if $50000 is invested in a bank account that pays 9.3% of interest compounded on a six-monthly basis, how much money will be in the account after 3 and 12 years? b) if matusalen's father had put $2.0 in the bank when he was born and there, how long would matusalen have had to his death (969 years later) if the interest was 7% per year composed each month and weekly?

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?