The graph of a quadratic function has vertex (1, 4), y-intercept at (0, 1) and passes through the point (3, -8). What is the equation of the quadratic function? A. f(x)= -(x-1)^2-4
B. f(x)= -3(x-1)^2-4
C. f(x)= -(x-1)^2+4
D. f(x)= -3(x-1)^2+4

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?

Darcy deposited $390 into a savings account. as long as the account balance remains at or above $150, she does not have to pay a service fee for the account. for how many months can she withdraw $40 a month without having to pay service fees? a) 3 b) 5 c) 6 d) 9

The volume of a rectangular prism is found by multiplying the length, width, and height of the prism. a rectangular prism has a width of 5x^2units, a length of 7x^3 units and a height of 2x^4 units. which is the volume of the prism in terms of x?