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butalik [34]
3 years ago
7

Afla suma numerelor 170 si238 572 si279 395si 123 628si 229 ​

Mathematics
1 answer:
REY [17]3 years ago
7 0

Answer:

Step-by-step explanation:

170 + 238 =408

572 + 279 =851

395 + 123 =518

628 + 229 =857

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A student stands 20 m away from the foot
Ostrovityanka [42]

Answer:

Height of tree is \approx <em>15 m.</em>

<em></em>

Step-by-step explanation:

Given that student is 20 m away from the foot of tree.

and table is 1.5 m above the ground.

The angle of elevation is: 34°28'

Please refer to the attached image. The given situation can be mapped to a right angled triangle as shown in the image.

AB = CP = 20 m

CA = PB = 1.5 m

\angle C = 34°28' = 34.46°

To find TB = ?

we can use trigonometric function tangent to find TP in right angled \triangle TPC

tan \theta = \dfrac{Perpendicular}{Base}\\tan C= \dfrac{PT}{PC}\\\Rightarrow tan 34.46^\circ = \dfrac{PT}{20}\\\Rightarrow PT = 20 \times 0.686 \\\Rightarrow PT = 13.72\ m

Now, adding PB to TP will give us the height of tree, TB

Now, height of tree TB = TP + PB

TB = 13.72 + 1.5 = 15.22 \approx <em>15 m</em>

7 0
4 years ago
Solve three and two fifths plus three and four sixths
Rasek [7]

Answer:

7 1/15

Step-by-step explanation:

3 2/5 + 3 4/6 = 7 1/15

4 0
2 years ago
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8 0
4 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
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