19) Resolva os problemas: a) Joana ganhou 236.089,50 recebeu uma dívida de 9.480,35 comprou um
carro por 119.800,80 pagou uma dívida de 12.640,90. Quanto restou para
Joana?​

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

What is the perimeter of square abcd? units units 28 units 37 units

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.