Is this correct if not how do you do? explain!

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

The intensity, or loudness, of a sound can be measured in decibels (db), according to the equation 0b is the intensity of a given sound and lo is the threshold of hearing intensity. what is the intensity, in decibels, [l(db)], when 1 - 10"(%)? use a calculator. round to the nearest whole number a. 15. b. 32 c. 320 d. 737

Marie daggett went to her bank each week and opened a club account. she deposited $21.75 per time period. if she made 12 deposits before interest was credited, how much would she have deposited before interest was credited? a. $9.75 b. $33.75 c. $181.25 d. $261.00