Solve 5^x=81.2. round to the nearest ten-thousands.

In a school 2/3 of the students study a language of those who study a language 2/5 study french

Pls the last one and it has to be like number 6

Will mark the brainliest.paula makes stained-glass windows and sells them to boutique stores. if her costs total $12,000 per year plus $4 per window for the frame. how many windows must she produce to earn a profit of at least $48,000 in one year if she sells the windows for $28 each?