On a backpacking trip through Europe, Ethan bought snacks for 10 Swiss francs. If the foreign exchange rate between the U. S. dollar and Swiss franc is 1:2, how much did Ethan spend in dollars?

A.$5
B. $15
C. $20

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?

Given right triangle xyz, which correctly describes the locations of the sides in relation to

Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?