(10+t)/(18+t)=8/10
8(18+t)=10(10+t)
144+8t=100+10t
44=2t
t = 22 throws
ANSWER
111.3 square units.
EXPLANATION
The formula for calculating the area of a triangle is.

Let us the side of the triangle with side 12 units to be the base of the triangle.
Then the height of the triangle can be determined from the diagram using trigonometry.



We now plug in the values in to the formula to obtain,


See graph
Answer:6.928
Step-by-step explanation: formula A=√ 3*(side^2/4)
345 in Standard Form is 3.45 x 10^2
This is because when in standard form the decimal should move to the right 2 times.