The third angle is 60 degrees. A triangle has 180 degrees so 180-30-90=60
Given:
The inequality is:

To find:
The graph of the given inequality.
Solution:
We have,

Subtract both sides by 1.


Divide both sides by 3.

The value of t is less than or equal to
.
Since
, it means
is included in the solution, therefore there is a closed circle at
and an arrow approaches to left from
.
Therefore, the correct option is A.
B. 5
Each row across (left to right) adds up to 43
Given:
Area of a circle, A=50.265 sq. units.
Radius of circle, r = 4 units.
To find:
The value of π to the nearest thousandth.
Solution:
Formula for area of a circle is



Now, using
expression, we can find the value of π.




Approximate the value to the nearest thousandth (three digits after decimal).

Therefore, the approximated value of π is 3.142.