(30 2007 P2
9,+ water vendor has a tank of capacity 18 900 litres. The tank is being filled with water
from two pipes A and B which are closed immediately when the tank is full. water flows at the rate of 150000cm cubed per minute through pipe A and 120000cm cubed per minute through B.
a)if the tank is empty and the 2pipes are opened at the same time, calculate the time it takes to fill the tank
b)On a certain day the vendor opened the two pipes A and B to fill the empty tank. after 25 minutes he opened the outlets tap to supply water to his customers at an
+verage rate of 20 litres per minute.

Calculate the time it took to fill the tank on that day.
if The vendor supplied a total of 542 jerricans, each containing 25 litres of
on that day. If the water that remained in the tank was 6 300 litres, calcu
in litres, the amount of water that was wasted.​

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.

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 > ?