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densk [106]
3 years ago
6

Use a proportion to solve the problem. Round to the nearest tenth as needed. A building casts a shadow 36 m long. At the same ti

me, the shadow cast by a 40-cm tall pole is 68 cm long. Find the height of the building.
Mathematics
1 answer:
Ksenya-84 [330]3 years ago
5 0
40/68=x/36
The answer is x=21.2
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How would you use estimation to evaluate this expression 10.2 x [(2x3.7)+8]
Goryan [66]
Round off the decimals to a sensible number. So 3.7 would be 4 and 10.2 would be 10. In this case, it would be (2 × 4 + 8) × 10 which is 160.
6 0
3 years ago
2ab+6a+12abc factored completely
pav-90 [236]
2a(b+3+4bc) 
just take out the greatest common factor  :) 
5 0
3 years ago
Someone help me with this !!!
charle [14.2K]

Answer:

150°

Step-by-step explanation:

to find the individual angle of a REGULAR dodecagon (which means that all sides are equal), you'd use the equation I(individual angle)= (n-2)×180/n

N is number of sides. The number of sides on a dodecagon is 12. So, substitute N for 12

I= (12-2)×180/12 which simplifies to 10×180/12

10×180= 1800

1800/12 = 150

so, an individual interior angle of a dodecagon is 150°

6 0
3 years ago
Please answer ASAP!
7nadin3 [17]

Answer:

h = 4.5 inches

Step-by-step explanation:

The area of a trapezoid is given by

A = 1/2 (b1+b2) h

We know A b1 and b2

20.25 = 1/2 (5+4)*h

20.25 = 9/2 h

Multiply each side by 2/9 to isolate h

2/9 * 20.25 = 2/9 *9/2 h

4.5 =h

6 0
3 years ago
Answer number 14. It’s very difficult for me and i need some help.
professor190 [17]

Answer:

1201.2 in (100.1ft)

Step-by-step explanation:

A scale model represents a ratio. All sides must be shrunk or increased based on a constant value. In this case the ratio of the model is 1/13 the size of the original giving us a 1:13 ratio. So each side of your scale model must be multiplied by 13 to find the real value of the side.

First convert all units to inches then divide the width of the real windmill by the width of the scale model (both in inches) you will see the answer is 13. Multiply the inch values of all sides of your model by 13 and this gives you the proportional value of each side of the real windmill in relation to the scale model.

5 0
2 years ago
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