<h3><u>Answer</u>

ΔABF is an isosceles right triangle,BC=20-18

</h3>
Answer:
40
Step-by-step explanation:
The formula for a rhombuses area is (pq)/2. If we fill in the values, we get 80/2 = 40
Hope this helped! If this is incorrect, please tell me and I will fix it as soon as possible!
Answer;
The answer is the second; log ₁₂1/4
Explanation;
From the laws of logarithms, given an expression in the form;
Log ₓ y, where x is the base and y is the number, we can apply the change of base formula to a logarithmic expression to get;
Log y/log x, which are to base 10
Thus; Log₁₂1/4 = log 1/4/ log 12