Answer:
B.) 7.2
Explanation:
Use the sine ratio,
, because we know the value of the hypotenuse and need to know the value opposite the given angle, 28°. Insert the values:
![sin28=(x)/(15)](https://img.qammunity.org/2021/formulas/mathematics/high-school/jyhuxx3jtvgqqweshxft0h3dsizn8f32tq.png)
Solve for x. Multiply both sides by 15 to isolate x:
![15*(sin28)=15*((x)/(15))\\\\15*sin28=x\\\\x=15*sin28](https://img.qammunity.org/2021/formulas/mathematics/high-school/g2ghadg6rcjhd8ouum2s4vwvof97gc8wqo.png)
Enter value into calculator:
![x=7.042...](https://img.qammunity.org/2021/formulas/mathematics/high-school/nw01sa63v68dgdfj4snn67kb3br3gbzy2f.png)
Round to the nearest tenth:
![x=7.0](https://img.qammunity.org/2021/formulas/mathematics/high-school/gvf9q6ggsh4xi09ltzdo8sk16yyerkak3o.png)
Option B is closest to the value of x.
Finito.