What is the volume of a triangular pyramid that has a base area of 8.2 square centimeters and a height of 4
1 answer:
Answer:
Step-by-step explanation:
The volume of a triangular pyramid can be found using the following formula:
Basically, we have to multiply 1/3, the height, and the base area.
We know that the base area is 8.2 square centimeters and the height is 4 centimeters.
Substitute the values into the formula.
Multiply 8.2 square centimeters and 4 centimeters.
- 8.2 cm² * 4 cm= 32.8 cm³
Multiply 1/3 and 32.8 cubic centimeters.
Round to the nearest tenth.
The 3 in the hundredth place tells us to leave the 9 in the tenth place.
The volume of the triangle pyramid is about 10.9 cubic centimeters.
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Answer:
15% off
Step-by-step explanation:
We know we paid $25.50 of the original $30. We can divide these two numbers . This is means we paid 85% of the original price. The discount percentage is the remaining percentage from 85 to 100 which is 15. The pants were 15% off.
Answer:
1. A
2. D
3. D
Step-by-step explanation:
The standard form of a parabola is
..... (1)
Where, (h,k) is vertex, (h,k+p) is focus and y=k-p is directrix.
1. The directrix of a parabola is y=−8 . The focus of the parabola is (−2,−6) .
...(a)
.... (b)
On solving (a) and (b), we get k=-7 and p=1.
Put h=-2, k=-7 and p=1 in equation (1).
Therefore option A is correct.
2 The directrix of a parabola is the line y=5 . The focus of the parabola is (2,1) .
...(c)
.... (d)
On solving (c) and (d), we get k=3 and p=-2.
Put h=2, k=3 and p=-2 in equation (1).
Therefore option D is correct.
3. The focus of a parabola is (0,−2) . The directrix of the parabola is the line y=−3 .
...(e)
.... (f)
On solving (e) and (f), we get k=-2.5 and p=0.5.
Put h=0, k=-2.5 and p=0.5 in equation (1).
Therefore option D is correct.
Answer:
Step-by-step explanation:
the lines weren't really clear so sorry if its a bit messy
