The diagram shows a rhombus ABCD in which the point A is (-1, 2), the point C is (5, 4) and the point B lies on the y-axis. Find
(i) the equation of the perpendicular bisector of AC,
[3]
(ii) the coordinates of B and D.
[3]
(iii) the area of the rhombus.
[3]​

What is the common difference in the following arithmetic sequence 7,3,-1,-5

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.

Hurry if the population of of an ant hill doubles every 10 days and there are currently 100 ants living in the ant hill what will the ant population be in 20 days