Right Triangle A is a scale drawing of right triangle B. What is the area of right triangle B ?

I'm being volume of cylinder with 13 in. radius and 30 in height answer choices in pic

Bismuth-210 is an isotope that radioactively decays by about 13% each day, meaning 13% of the remaining bismuth-210 transforms into another atom (polonium-210 in this case) each day. if you begin with 233 mg of bismuth-210, how much remains after 8 days?

Which of these triangle pairs can be mapped to each other using two reflections?