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Simora [160]
2 years ago
10

How do l do this I’m so confused

Mathematics
1 answer:
Anika [276]2 years ago
7 0

Answer:

967.6cm^{2}  (1 d.p)

Step-by-step explanation:

Total Surface Area of Cylinder = 2\pi rh+2\pi r^{2}

Given from the question, r = 7 cm and h = 15cm

Lets Substitute r and h into the formula to find the Total Surface Area of the cylinder.

Total Surface Area of Cylinder = 2\pi (7)(15)+2\pi (7)^{2} \\=210\pi +98\pi \\=308\pi cm^{2} \\=967.6cm^{2}  (1 d.p)

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Need help with the question at the top<br><br> Thanks
Effectus [21]

First we must find area of a single square.

Meaning we divide total area of 80 centimetres squared by 5 since we have 5 squares in the shape.

A_{square}=\frac{A_{shape}}{5}=\underline{16}

Now from the picture we can see that the perimeter of shape is combined by 4 times 3 times the length of side of 1 square.

So we need to find side of 1 square.

a=\sqrt{A_{square}}=\sqrt{16}=\underline{4}

As we stated before the formula for perimeter of this shape is:

P=4(3\cdot a)=4(3\cdot4)=4\cdot12=\boxed{48}

The perimeter of shape is 48 centimetres.

Hope this helps.

r3t40

8 0
3 years ago
Janelle is painting a spherical model of a human cell for a science fair. She uses 615.44 square inches of paint to
liberstina [14]

The diameter of the cell model according to the taks content is; 14in.

<h3>Diameter of the cell model</h3>

Volume of paint = 615.44 square inches

π = 3.14

Volume of a sphere = 4πr²

615.44 = 4 × 3.14 × r²

615.44 = 12.56/r²

r² = 615.44 ÷ 12.56

r² = 49

r = 7

Hence, the diameter of the cell is; 2 × r = 2 × 7 = 14in.

Learn more about volume of sphere:

brainly.com/question/10171109

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3 0
2 years ago
(+×9)(×-2) can some one solve it
marshall27 [118]
X2 - 2x + 9x - 18
X2 + 7x - 18
4 0
3 years ago
Renee hiked for 8 and 3/4 miles. After resting, Renee hiked back along the same route for 7 and 1/4 miles. How many more miles d
mart [117]
The answer is 3/2. you do this by subtracting 7 1/4 from the 8 3/4 and simplifying the 6/4!
6 0
3 years ago
The data below are the monthly average high temperatures for New York City. What is the five-number summary? 40, 40, 48, 61, 72,
yawa3891 [41]

Answer:

B) Sample minimum: 40, Sample maximum: 84

Q1: 45, Median: 63, Q3: 77

Step-by-step explanation:

The first step is to write the temperatures in crescent order:

40, 40, 42, 48, 54, 61, 65, 72, 76, 78, 84, 84,

The sample minimum is the lowest value = 40

The sample maximum is the highest value = 84.

Since there are 12 numbers, the sample median is the average between the 6th and 7th terms:

M = \frac{61+65}{2}\\ M=63

The first quartile is the average between the 3rd and 4th terms:

Q_1 = \frac{42+48}{2}\\ Q_1=45

The third quartile is the average between the 9th and 10th terms:

Q_3 = \frac{76+78}{2}\\ Q_3=77

Therefore, the answer is:

B) Sample minimum: 40, Sample maximum: 84

Q1: 45, Median: 63, Q3: 77

8 0
3 years ago
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