The equation y=9.5x+100 represents the amount y that javier earns by working at the grocery store for x hours, plus a holiday bonus. Which of the following is the amount of javiers holiday bonus

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?

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)