3 years ago

What is the surface area of this right rectangular prism glass slab with dimensions of 20 inches by 3 inches by 12 inches?

Mathematics

1 answer:

Art [367]3 years ago

7 0

Answer:

C. 672

Step-by-step explanation:

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Write a percent that has a value between the two decimals 0.4 and 0.5

Juliette [100K]

A percent would be 0.45

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4 years ago

Tienes un triángulo equilátero con lados de 10cm, lo divides en dos partes de manera horizontal tal que el área de ambos figuras

Tanya [424]

Answer:

x = 10/√2 ≈ 7.07

Step-by-step explanation:

Comenzaremos por dividir el triángulo en dos partes y definir H, como en la figura adjunta.

Aplicando el teorema de Tales, sabemos que:

$\dfrac{l/2}{H}=\dfrac{x/2}{h}\\\\\\\dfrac{l}{H}=\dfrac{x}{h}$

También sabemos que, dado que el tirángulo menor es la mitad que el triángulo mayor, la relación entre áreas es:

$\dfrac{A}{A_x}=\dfrac{lH/2}{xh/2}=\dfrac{lH}{xh}=2$

Dado que formamos dos triángulos rectángulos, podemos despejar el valor de H como:

$(l/2)^2+H^2=l^2\\\\H^2=l^2-(l/2)^2=10^2-5^2=100-25=75\\\\H^2=\sqrt{75}$

Podemos entonces despejar x de la siguiente manera:

$h=\dfrac{H}{l}\cdot x=\dfrac{lH}{2x}\\\\\\2x^2\dfrac{H}{l}=lH\\\\\\2x^2=l^2\\\\\\x=\dfrac{l}{\sqrt{2}}=\dfrac{10}{\sqrt{2}}\approx7.07$

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4 years ago

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Liula [17]

Answer:

5. 52+56 < 49x -46x

108< 3x

108/3< 3x/3

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2 years ago

Which is the steepest? Explanation that includes the graph. (The graph is on the picture)

fomenos

Answer:

Step-by-step explanation:

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3 years ago

Please help me answer this

Tanya [424]

Answer:

252

Step-by-step explanation:

(5+22) x (35-27) + $6^{2}$

27 x 8 + $6^{2}$

27 x 8 + 36

216 + 36

252

3 0

3 years ago

Read 2 more answers