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SIZIF [17.4K]
3 years ago
8

Calculator

Mathematics
1 answer:
satela [25.4K]3 years ago
4 0
3 should be it......
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Use the net as an aid to compute the surface area (rounded to the nearest integer) of the triangular pyramid with an equilateral
aleksandrvk [35]

Answer:

Correct answer is C)\ 254\ m^{2}

Step-by-step explanation:

As per the given diagram, we know the following details:

Height of the triangular pyramid is <em>14m</em>.

<em>Side of base</em> = <em>10m </em>

Height of Triangular base = <em>8.7m</em>

Formula for <em>surface area of triangular pyramid</em>:

\text{Area = Area of Triangular base + 3 }\times\text{Area of side triangle}

(Triangular base is shown in the dotted lines in the question figure.

The other 3 triangles are the side triangles.)

We know that,

\text{Area of a triangle = }\dfrac{1}{2} \times \text{Base} \times \text{Height}

\Rightarrow \text{Required Surface Area = } \dfrac{1}{2} \times 8.7 \times 10 + 3 \times \dfrac{1}{2} \times 14 \times 10\\\Rightarrow \dfrac{1}{2}\times (87 + 3 \times 140)\\\Rightarrow \dfrac{1}{2}\times (87 + 420)\\\Rightarrow \dfrac{1}{2} \times 507\\$\approx$ 254 m^{2}

Hence correct answer is C)\ 254\ m^{2}.

3 0
3 years ago
This table shows the linear relationship of the cost in dollars, y, of buying snack packets, x.
Karolina [17]

Answer:$1.25

Step-by-step explanation:

2 divided by 1.60=$1.25

3 divided by 2.40= $1.25

5 divided by 4.00= $1.25

8 divided by 6.40 = $1.25

3 0
3 years ago
3 A piece of ibbon of lengh 84 cm is divided
xxMikexx [17]

Add the 3 ratio portions together: 1 + 4 + 7 = 12

Divide total length by 12:

84/12 = 7

Multiply each ratio portion by 7:

1 x 7 = 7

4 x 7 = 28

7 x 7 = 49

The longest piece is 49 cm

3 0
3 years ago
Read 2 more answers
What is the slope-intercept equation of this line?
svet-max [94.6K]
Your answer would be A. y = -3 + 4

the line intercepts the y axis at +4
and the line decreases 3 units down and one unit to the right which makes the slope ( rise over run) -3/1 but you would just say -3
8 0
3 years ago
Lou deposited $3,500 into a savings account. The simple interest rate is 4%. How much interest will the account earn in 10 years
finlep [7]

Answer:

2 years : $280

10 years: $1400

Step-by-step explanation:

3 0
3 years ago
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