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2 years ago

Plzzz help me I am Timed!

Mathematics

1 answer:

Inga [223]2 years ago

5 0

Answer:

Step-by-step explanation:

structure with a square or triangular base and sloping sides that meet in a point at the top

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PLEASE PLEASE ANSWER!

muminat

The area of the shaded region is $$8(\pi \ -\sqrt{3})\ \text{cm}^2$ .

Solution:

Given radius = 4 cm

Diameter = 2 × 4 = 8 cm

Let us first find the area of the semi-circle.

Area of the semi-circle = $\frac{1}{2}\times \pi r^2$

$$=\frac{1}{2}\times \pi\times 4^2$

$$=\frac{1}{2}\times \pi\times 16$

Area of the semi-circle = $$8\pi$ cm²

Angle in a semi-circle is always 90º.

∠C = 90°

So, ABC is a right angled triangle.

Using Pythagoras theorem, we can find base of the triangle.

$AC^2+BC^2=AB^2$

$AC^2+4^2=8^2$

$AC^2=64-16$

$AC^2=48$

$AC=4\sqrt{3}$ cm

Base of the triangle ABC = $4\sqrt{3}$ cm

Height of the triangle = 4 cm

Area of the triangle ABC = $\frac{1}{2}\times b \times h$

$$=\frac{1}{2}\times 4\sqrt{3} \times 4$

Area of the triangle ABC = $8\sqrt{3}$ cm²

Area of the shaded region

= Area of the semi-circle – Area of the triangle ABC

= $$8\pi \ \text{cm}^2-8\sqrt{3}\ \text{cm}^2$

= $$8(\pi \ -\sqrt{3})\ \text{cm}^2$

Hence the area of the shaded region is $$8(\pi \ -\sqrt{3})\ \text{cm}^2$ .

3 0

2 years ago

What expression could be a calculators display of the number 0.0000000000096?

Vaselesa [24]

9.6x_12................
10

6 0

3 years ago

A recursive rule for an arithmetic sequence is a1 = 4; an = an-1 + 3 . What is an explicit rule for this sequence? (Picture atta

Slav-nsk [51]

Answer: 3n+1
(no need to type in the "a_n" or "an" part, as it's already done)

--------------------------------------------------------------------------

Explanation:

The first term is a1 = 4 since it is given to us
The common difference is d = 3. This is the value that we add to each term to get the next as the recursive steps shows when we write a(n) = a(n-1)+3
In other words,
nth term = [ (n-1)st term ] + 3
next term = (previous term) + 3

Using a1 = 4 and d = 3, we get the following
an = a1+d(n-1)
an = 4 + 3(n-1)
an = 4+3n-3
an = 3n + (4-3)
an = 3n+1

7 0

3 years ago

Read 2 more answers

Zoey is designing a jewelry box in the shape of a rectangular prism. The base is 6 inches by 5 inches and the height is 4 inches

gregori [183]

The box measures 6 by 5 by 4
Area of the top and bottom = 2* (6*5) = 60 square inches
Area of the sides = 2 * (5 * 4) = 40 square inches
Area of front and back = 2 * (6 * 4) = 48 square inches
60 + 40 + 48 = 148 square inches

8 0

3 years ago

Read 2 more answers

I'LL GIVE BRAINLIST!!! 1. Find the missing parts of the triangle. Round to the nearest tenth when necessary or to the nearest mi

svet-max [94.6K]

Answer:

c=13.6km, B=47.9⁰, A=22.8⁰,

4 0

2 years ago