Answer:
21mm
Step-by-step explanation:
The formula for solving the area of a rhombus is :
, where x and y are two intersecting diagonals.
In this case, we are given both values, thankfully. 6 and 7 are to be replaced with x & y. Now, the rest you have to do is simple math.

The area of the rhombus is 21mm.
Answer:
B) 2,340
Step-by-step explanation:
A parabola is a curve where any point is at an equal distance from:
<span><span>a fixed point (the focus ), and </span><span>a fixed straight line (the directrix )</span></span>
The curve is defined by: <span>y</span><span>2</span><span> = 4ax.</span>
√42
6²=36
7²=49
(6 1/2)² = 42.25
√42 ≈ 6.5