Awedding reception is held at a restaurant in mississippi. the food and drinks cost $1492.50. the state sales tax rate is 7%, and the restaurant automatically add a 20% tip for large parties.
a)find the state sales tax

b)find the tip

c)what is the total bill(food and drinks+tax+tip)

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

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