Pls pls pls help!!!!!!

1 answer:

5 0

9514 1404 393

Answer:

Step-by-step explanation:

The surface area of one cone with slant height s and radius r is ...

SA = πr² +πrs = πr(r+s)

For the cone that is half an ornament, the surface area is ...

SA = (3.14)(4.2 cm)(4.2 cm + 10.2 cm) = 189.9072 cm²

The area of one ornament is the area of two cones:

one ornament area = 2×189.9072 cm² ≈ 379.8 cm²

60 ornaments will be 120 cones, so will have a total surface area of ...

total area = 120(189.9072 cm²) = 22,788.864 cm²

If one bottle of paint will cover 201 cm², then the number of bottles of paint required is ...

(22788.864 cm²)/(201 cm²/bottle) ≈ 113.4 bottles

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4 years ago

MrRissso [65]

To solve the problem we must know about Sine Rule.

The sine rule of trigonometry helps us to equate the side of the triangles to the angles of the triangles. It is given by the formula,

$\dfrac{Sin\ A}{\alpha} =\dfrac{Sin\ A}{\beta} =\dfrac{Sin\ A}{\gamma}$

where

Sin A is the angle and α is the length of the side of the triangle opposite to angle A,
Sin B is the angle and β is the length of the side of the triangle opposite to angle B,
Sin C is the angle and γ is the length of the side of the triangle opposite to angle C.

The value of w is 4.0 cm.

Given to us