Answer:
18
Step-by-step explanation:
<em>Answer</em>
Part 1: Three and four tenths.
Part 2: 3.0 + 0.4
<em>Explanation. </em>
When writing numbers in words we must use the concept of place values. In this case for instance, the place value of 3 is ones and the place value of 4 is tenths hence called the "<em>four tenths</em>".
3.4 can be written as the sum of 3 and 0.4. So 3.4 in its expanded form is (3+0.4).
1453.6000000000001 That is the percent
AB is the longest side, so ∠C is the largest angle.
use law of cosine: 16²=9²+12²-2*9*12cosC
216cosC=81+144-256=-31
cosC=-0.14352
C≈98
