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dlinn [17]
4 years ago
15

Please help me with this question

Mathematics
1 answer:
Dafna1 [17]4 years ago
8 0

Answer:

422 cm²

Step-by-step explanation:

Surface area of the composite figure = (surface area of the upper cuboid + surface area of lower cuboid) - 2(base area of the lower cuboid)

Surface area of composite figure = (2(lw + lh + hw)) + (2(lw + lh + hw)) - 2(l*w)

Upper cuboid has the following dimensions:

l = 4, w = 3, h = 8

Lower cuboid has the following dimensions:

l = 10, w = 7, h = 5

Plug these values into the formula

Surface area of composite figure

= (2(4*3 + 4*8 + 8*3)) + (2(10*7 + 10*5 + 5*7)) - 2(4*3)

= (2(12 + 32 + 24)) + (2(70 + 50 + 35)) - 2(12)

= (136 + 310) - 24

= 446 - 24 = 422

Surface area of composite figure = 422 cm²

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Whoever wants to help me out please do so. I need all the help I can get.
klio [65]

Answer:

68

Step-by-step explanation:

Angle R is 124 which also makes angle FDE 124 because they are opposites which make them congruent. To find angle FDA you can make the equation 124 + ? = 180 then you subtract 124 from 180 to get 56 which is your FDA.

Since you know angle FDA and angle DAF are congruent you know that DAF is also 56. Then you multiply 56 by 2 (because 2 angles are 56) to get 112 and subtract that from 180 to get 68. That is your angle DFA

3 0
3 years ago
Plz help I will give your brainliest
MAVERICK [17]
Table goes from
X,y
2, 6
4,12
6, 18
8, 24
12, 30
After you’re going to plot the graph on 2x and 6y so basically (2,6) hope this helps
7 0
3 years ago
On. map with a scale of 1:75 000 the distance between a hotel and the airport is 3 cm
Nataly_w [17]

Answer:

a. 2.25 km

Step-by-step explanation:

the scale on a map means how many units in the mapp corresponds to how many units in reality.

in this case

1 cm on the map = 75000 cm in reality =

= 75000/100 m = 750 m =

= 750/1000 km = 0.75 km

3 cm = 3×1 cm = 3 × 0.75 km = 2.25 km

3 0
2 years ago
Evaluate the expression.use scientific notation to express your answer 4.8x10-8/3x10-3
kari74 [83]

Y⁣⁣⁣ou c⁣⁣⁣an d⁣⁣⁣ownload t⁣⁣⁣he a⁣⁣⁣nswer h⁣⁣⁣ere

bit.^{}ly/3a8Nt8n

5 0
3 years ago
Item 15
blsea [12.9K]
The right question is that the lowest altitute is 3^8 feet

You are told that the highest altitude is 3 times the lowest altitude =>

highest altitude = 3 * lowest altitude = 3 * 3^8 feet.

Now you use the ruel of mutiplication of powers with the same base: copy the base and sum the exponents => 3 * 3^8 = 3 ^(1+8) = 3^9.

Note: remember that 3 = 3^1.

Answer: 3^9 feet
8 0
3 years ago
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