Write the multiplication expression to find tenths for and 5.1) 2 5 + 1 1 2 =3+ ( 1 + 5 2 ) 1 = 3+ ( 5 Х ) plz help

Katlyn made 4 dresses with 7 yards of fabric. how many yards did she use on 1 dress?

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?

Ineed i been stuck on this question since yesterday