Log_10 x =2 what does x equal Plz help

Cara earns a base pay of $1800 per month at a car dealership plus a commission of 6% of her sales. what are caras total earning in a month in which she sells $40000 worth of merchandise

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

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