The correct answer is A. Longing I know because I just finished the quiz.
2/7.
2/7 + 5/7 =1 Just add the numerator if the denominator is the same
The answer is 18 cm because 2.4 cm is in 1 inch. you must multiply 7.5 by 2.4 and get 18
Answer:

Step-by-step explanation:
sine of A = 
opposite = 5
adjacent = 12
hypotenuse = 13
Recall that the volume of a regular prism is given by the area of the base times the height.
Given that the base of the prism is a regular pentagon with an apothem of 2.8 centimeters.
The pentagon consist of 5 isosceles triangles with the apothem as the height and the side of the pentagon as the base.
Recall that the are of a triangle is given by 1/2 base times height.
Thus the area of of the pentagon base of the prism is given by

Therefore, the volume of the prism is given by