Find the equation of the parabola with its focus at (-7,6) and its directrix at y = 4. A) y = 1/4(x + 5)2 + 7
B) y=1/8(x + 7)2 + 5
C) y=1/4(x - 7)2 + 5
D) y = 1/4(x + 7)2 + 5

Find the value of the cosine for angle a

Experimental versus theoretical probability. someone me

Abank manager wants to encourage new customers to open accounts with principals of at least $2 comma 500. he decides to make a poster advertising a simple interest rate of 3%. what must the principal be if the bank manager also wants to advertise that one can earn $10 the first month? can the poster correctly say, "open an account of $2 comma 500 and earn at least $10 interest in 1 month! "?