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ryzh [129]
3 years ago
12

Q1 [5]

Mathematics
1 answer:
ValentinkaMS [17]3 years ago
5 0

Answer:

The required drawing showing the cliff, river, and tower as well as the details in the question is attached, please find alongside the answer

The width of the river is approximately 51.55 meters

Step-by-step explanation:

The height of the observation tower = 11 meters

The angle of elevation of the cliff top and the opposite side of the river = 20°

The angle of elevation of the tower top and the opposite side of the river = 30°

Therefore, by sine rule, we have;

h/sin(20) = w/sin(60)

11/sin(10) = length, l/sin(60)

l = sin(60) ×11/sin(10) ≈ 54.86 meters

w = l × cos (20) = 54.86 meters × cos (20) ≈ 51.55 meters

The width, w, of the river is approximately 51.55 meters.

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Kate had a sum of money,she spent 1/8 of the money on a skirt and the remaining amount on a handbag,the skirt cost $16,how much
tiny-mole [99]

Answer:

$18.28

Step-by-step explanation:

Step one:

given data

Kate had a sum of money,she spent 1/8 of the money on a skirt and the remaining amount on a handbag

let the total money be x

so  mathematically

x-1/8*x= 16

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x-x/8= 16

8x-x/8= 16

7x/8=16

cross multiply

7x= 8*16

7x=128

divide both sides by 7

x=128/7

x=$18.28

7 0
3 years ago
Express your answer in scientific notation:<br> 8.8 * 10^7 + 3.1 * 10.8 =
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7 0
2 years ago
Calculate the length of AC to one decimal place in the trapezium below.
a_sh-v [17]

Answer:

First we will split trapezium on two geometric figure.

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We will use Pythagorean theorem to find the second cathetus b

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AC=18.1cm

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3 years ago
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Maurinko [17]

Step-by-step explanation:

i hope this helps its kind of hard to see but i tried lol

4 0
3 years ago
I need this answered its due soon
mixer [17]
<h2><u>C D E</u></h2>

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C is true

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7 0
2 years ago
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