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ad-work [718]
3 years ago
9

A gardener cuts a plant down by 1 5/8 inches.The plant then grows 9 1/4 more inches. What is the total change in the height of t

he plant?
Mathematics
1 answer:
Fynjy0 [20]3 years ago
6 0

Answer:

7 7/8 inches

Step-by-step explanation:

Example:

Start with a 3 inch plant

3 - 1 5/8 = 1 3/8

It grows 9 1/4 but you started at threelsdjf;lasjdflkjsdfl

9 1/4 - 1 3/8 = 7 7/8

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to estimate the height of the jin mao tower in shanghai , a tourist sights the top of the tower form a mirror that is 86.7 meter
Ray Of Light [21]

Answer:

The height of the tower = 420.48 meters

Step-by-step explanation:

For better understanding of the solution, see the figure attached below :

Let the height of the tower be x meters

Now, using the laws of reflection : angle of reflection = angle of incidence

Also, both the tower and the tourist are standing parallel to each other

⇒ ∠A = ∠i ( Alternate interior angles are equal)

Similarly, ∠D = ∠r ( Alternate interior angles)

But, ∠i = ∠r

⇒ ∠A = ∠D

Also, the tourist and the tower is perpendicular to the ground surface.

⇒ m∠B = m∠E = 90°

Now, in ΔABC and ΔDEC

∠A = ∠D (Proved above)

m∠B = m∠E = 90°

So, by AA postulate of similarity of triangles, ΔABC ~ ΔDEC

As the sides of similar triangles are proportional to each other

\frac{AB}{DE}=\frac{BC}{EC}\\\\\implies\frac{1.92}{x}=\frac{0.4}{87.6}\\\\\implies x=\frac{87.6\times 1.92}{0.4}\\\\\bf\implies x = 420.48\textbf{ meters}

Hence, The height of the tower = 420.48 meters

5 0
3 years ago
Expand and simplify bracket please quickly
natulia [17]

Answer:

4y²-1/4 is the required answer

Step-by-step explanation:

(2y -  \frac{1 }{2} )(2y +  \frac{1}{2} ) \\ using \: formula \:  {x}^{2}  - y {}^{2}  = (x - y)(x + y) \\ 4y {}^{2}  -  \frac{1}{4}

4 0
1 year ago
Could you please help me plzz I want to past my exam plzzzz
lorasvet [3.4K]
Pretty sure it’s D but if it is not then I don’t know
3 0
2 years ago
We would like to cut exactly 160 meters of wire. Instead of measuring the length, we measure the weight. It is known that 3 mete
ivanzaharov [21]
The weight is 4000 grams, or 4 kg
7 0
3 years ago
Monica's rectangular living room is 12 ft by 15 ft. She has a square rug that covers 5/9 of the area of the floor. What is the s
GarryVolchara [31]
10 ft i think. 5/9 of 180 (which is 12 x 15) is 100 and 10 x 10 is 100
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3 years ago
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