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topjm [15]
3 years ago
10

Help please :( ASAP don’t do wrong answers

Mathematics
1 answer:
lukranit [14]3 years ago
8 0

Answer:

D. 140

Step-by-step explanation:

volume equals length times width times height 7 times 4 times 5 equals 140 good luck

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Pls help
KATRIN_1 [288]

Answer:

169.04 in² (nearest hundredth)

Step-by-step explanation:

Surface area of a cone = \pir² + \pirl

(where r = radius of the base and l = slant height)

Given slant height l = 10 and surface area = 188.5

Surface area  = \pir² + \pirl

188.5 = \pir² + 10\pir

\pir² + 10\pir - 188.5 = 0

r = \frac{-10\pi +\sqrt{(10\pi )^2-(4\times\pi \times-188.5)} }{2\pi } = 4.219621117...

Volume of a cone = (1/3)\pir²h

(where r = radius of the base and h = height)

We need to find an expression for h in terms of l using Pythagoras' Theorem a² + b² = c², where a = radius, b = height and c = slant height

r² + h² = l²

h² = l² - r²

h = √(l² - r²)

Therefore, substituting found expression for h:

volume of a cone = (1/3)\pir²√(l² - r²)

Given slant height l = 10 and r = 4.219621117...

volume = 169.0431969... = 169.04 in² (nearest hundredth)

5 0
2 years ago
Read 2 more answers
A 2-ft vertical post casts a 16-in. shadow at the same time a nearby cell phone tower casts a 120-ft shadow. How tall is the cel
Snowcat [4.5K]
Do 120÷8 aka 15  that is the answer 
3 0
3 years ago
What is the Factor −14 out of −12x−54y.
SVETLANKA909090 [29]

2 is your answer duuuuuuuuuuuude

8 0
3 years ago
Can someone actually help me please?
Tamiku [17]
D and B is the anwser
5 0
2 years ago
If you save 10% off headphone that normally<br> cost $8.90, how much do you have to pay?
Masteriza [31]

Answer:

1.1

Step-by-step explanation:

looked it up

6 0
3 years ago
Read 2 more answers
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