Answer:
r = 9
Step-by-step explanation:
cross multiply
9 * r = 81
9r = 81
divide both sides by 9
r= 81/9
r = 9
Given:
A prism with right triangular base.
Base of triangle = 6 ft
Height of triangle = 8 ft
Height of prism = 7
To find:
The volume of the given prism.
Solution:
The volume of prism is:
...(i)
Where, B is the base area and h is the height of the prism.
In the given figure, the base of the prism is a right angle triangle with legs 6 ft and 8 ft. So, the area of the base is:




Substituting
in (i), we get


Therefore, the volume of the prism is 168 cubic ft.
Angle EBD and Angle DBE are adjacent
Multiply the cost of the meal by 0.15 ( 15% as a decimal).
8.95 x 0.15 = 1.34
The amount of the discount would be $1.34
Extra:
If you need to find out how much a senior citizen pays, you would subtract the amount of the discount from the original price:
8.95 - 1.34 = $7.61