Which shape has 4 lines of symmetry 4 right angles 4 sides of equal length

The manufacturer of a new product developed the following expression to predict the monthly profit, in thousands of dollars, from sales of the productwhen it is sold at a unit price of x dollars.-0.5x^2 + 22x - 224what is represented by the zero(s) of the expression? a.the profit when the unit price is equal to 0b.the unit price(s) when the profit is equal to 0c.the profit when the unit price is greatestd.the unit price(s) when profit is greatest

What is the y-intercept of the line given by the equation

Acircle has a circumference of 7.850 units. what is its radius?