Answer:
160cm^2
Step-by-step explanation:
So the surface area is basicly the sum of all the areas of the rectangles in this prism.
So the formula can be written as 
.
The w stands for width, the h stands for height, and the l stands for length.
5cm is the width, 10 cm is the length, and 2 cm is the height.
So inserting all those values for the variabls the formula now looks like this.
.
So 5*10 is <u><em>50</em></u>
2*10 is <u><em>20</em></u>
2*5 is <em><u>10</u></em>
So adding all that up we get 80.
Then multiplyong that by 2 we get 160cm^2.
Answer:
8x
Step-by-step explanation:
x stands for a number
Based on the information provided and the requirements to organize the students, Jon most likely has 23 students.
<h3>How many students are needed to organize them in a rectangular grid?</h3>
In general, Jon will need a number that is not prime as this type of number will not allow him to complete all the grid.
<h3>Which are possible numbers?</h3>
20 = A rectangular grid of 5 x 4 seats can be arranged
21= A rectangular grid of 7 x 3 can be arranged
22 = A rectangular grid of 2 x 11 can be arranged
23 = It is impossible to organize 23 seats in a rectangular grid without gaps
Learn more about prime numbers in: brainly.com/question/9315685
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Answer: 2/5 ÷ 2 = 2/10 as simplified as 1/5 in fraction form. 2/5 ÷ 2 = 0.2 in decimal form.
Answer:
The radius of the circle ,r= 1.43 m
The length of the side of square ,a= 2.77 m
Step-by-step explanation:
Given that
L= 20 m
Lets take radius of the circle =r m
The total parameter of the circle = 2π r
Area of circle ,A=π r²
The side of the square = a m
The total parameter of the square = 4 a
Area of square ,A'=a²
The total length ,L= 2π r+ 4 a
20 = 2π r+ 4 a
r=3.18 - 0.63 a
The total area = A+ A'
A" =π r² +a²
A"= 3.14(3.18 - 0.63 a)² + a²
For minimize the area
3.14 x 2(3.18 - 0.63 a) (-0.63) + 2 a = 0
3.14 x (3.18 - 0.63 a) (-0.63) + a = 0
-6.21 + 1.24 a + a=0
2.24 a = 6.21
a=2.77 m
r= 3.18 - 0.63 a
r= 3.18 - 0.63 x 2.77
r=1.43 m
Therefore the radius of the circle ,r= 1.43 m
The length of the side of square ,a= 2.77 m
