6. the figure shows a circle, centre o. ac is a tangent
to the circle at a and obc is a straight line.
given that ac = 18 cm and bc = 12 cm, find
(1) the radius of the circle,
(ii) angle aob
(iii) the area of the shaded region.

The number of revolutions of two pulleys is inversely proportional to their diameters. if a 24-inch diameter pulley making 400 revolutions per minute is belted to an 8-inch diameter pulley, find the number of revolutions per minute of the smaller pulley.

Mama mia restaurant used 1 2 2 1 ? of their mozzarella cheese making pizza and the remaining 6 4 64 ounces making pasta. how many pounds of mozzarella cheese did mama mia start with?

The function f(x)= x5+ ( x + 3)2 is used to create a table. if x = -1 then what is f(x)?