If I have 48 cards and and gave 10 to my friend and I have 38 left what what fractionbb be is my original number of cards

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 3 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30∘c on monday, but decreased at a constant rate in the next 3 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.

Which statement justifies why angle ebc measures 90?