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stiv31 [10]
4 years ago
14

What is the surface area of the square pyramid represented by the net? Enter your answer in the box. cm² An unfolded square base

pyramid with sides of the base being seven centimeters and the length from the base to the tip is nine centimeters.
Mathematics
1 answer:
kumpel [21]4 years ago
3 0
Area of the base = 7 x 7 = 49 cm²

Area of the 4 triangles = 4 x [ 1/2 x 7 x 9]
Area of the 4 triangles = 4 x 31.5
Area of the 4 triangles = 126 cm²

Total Surface Area = 49 + 126 = 175 cm²

Answer: Total Surface Area = 175 cm²
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And also pls write down area of the square ​
Arte-miy333 [17]

since it is a square, all sides are 6. and the area would be 36 because 6x6 is 36! and the perimeter is 24! Hope this helps! :)

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3 years ago
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A group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time student
Scorpion4ik [409]

Answer:

Sample size should be atleast 55320

Step-by-step explanation:

Given that a  group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time students spent studying per week.

population standard deviation \sigma = 6 hrs

Std error = \frac{6}{\sqrt{n} }

Margin of error for 95%

= 1.96*\frac{6}{\sqrt{n} } 235.2\\n \geq 55319.04

Since sample size is number of items it cannot be indecimal.

So we can round off to the next high integer on a safer side.

7 0
4 years ago
Solve for the unknown variable:
Delvig [45]

Answer:

if it's a^2+b^2 question,the answer is 25.

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3 years ago
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Angle abc and dcb make a linear pair. of abc=2x+9 and dbc=10x+15,find x
Anuta_ua [19.1K]

Answer:

x = 13

Step-by-step explanation:

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8 0
3 years ago
Q9 A gardener wants to build this greenhouse in the top right hand corner of her garden.
aleksley [76]

Answer:

See attachment for drawing

Step-by-step explanation:

Given

See attachment for sketch of plan

Required

Draw a scaled plan

From the question, the garden has the following dimensions.

5.5m, 5.5m, 4m and 2.5m

Using a scale of 1m : 50 cm units, the above measurements will be represented as:

5.5m \to \frac{5.5m}{50cm} \to \frac{5.5m}{0.5m} \to 11cm

4m \to \frac{4m}{50cm} \to \frac{4m}{0.5m} \to 8cm

2.5m \to \frac{2.5m}{50cm} \to \frac{2.5m}{0.5m} \to 5cm

From the question, we understand that there will be 50cm space between the greenhouse and the edge.

On the scale drawing, this will be represented as:

50cm \to \frac{50cm}{50cm} \to 1cm

From the question, the green house has the following dimensions.

2m, 2.5m

On the scale drawing, this will be represented as:

2m \to \frac{2m}{50cm} \to \frac{2m}{0.5m} \to 4m

2.5m \to \frac{2.5m}{50cm} \to \frac{2.5m}{0.5m} \to 5m

<em>See attachment 2 for scale drawing</em>

4 0
3 years ago
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