Ayúdenme con esto porfavor y si se puede con proceso mejor.

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

Eliza wants to make $10,000 from her investments. she finds an investment account that earns 4.5% interest. she decides to deposit $2,500 into an account. how much money will be in her account after 14 years?