A soccer ball is thrown upward from a height of 11 feet with an initial velocity of 20 feet per second. The height of the ball is modeled using the
quadratic function h(t) = -16t^2 + 20t + 11 where h(t) is the height, in feet,
of the soccer ball and t is the time the ball has been in the air, in seconds.
When is the soccer ball above 15 feet? *

What is the equation of a line passing through (-6,5) and having a slope of 1/3

When a valve is open 281 gallons of water go through it in one hour the number of gallons that would go through in 94 hours is

I've been working on this for a few days and i just don't understand, it's due in a few hours. you. the direction of a vector is defined as the angle of the vector in relation to a horizontal line. as a standard, this angle is measured counterclockwise from the positive x-axis. the direction or angle of v in the diagram is α. part a: how can you use trigonometric ratios to calculate the direction α of a general vector v = < x, y> similar to the diagram? part b suppose that vector v lies in quadrant ii, quadrant iii, or quadrant iv. how can you use trigonometric ratios to calculate the direction (i.e., angle) of the vector in each of these quadrants with respect to the positive x-axis? the angle between the vector and the positive x-axis will be greater than 90 degrees in each case. part c now try a numerical problem. what is the direction of the vector w = < -1, 6 > ?