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mojhsa [17]
3 years ago
14

How tall is the tree? A. 8ft B. 15 Ft C. 18 FT D. 72 ft

Mathematics
2 answers:
Kobotan [32]3 years ago
8 0
We are supposed to assume ratio of similar triangles (since he is looking at mirror, angle of incendence=angle of reflection so all 3 angles are same and the triangles are similar)
use ratio
ratio of height of small triangle to base of small triangle=ratio of height of large triangle to base of large triangle
so6:2=h:246/2=h/243=h/24multiply both sides by 2472=hthe tree is 72ft tall
answer is D

Nostrana [21]3 years ago
5 0
The answer is d multiple the andeers
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A culture started with 5000 bacteria after 5 hours it grew to 6500 bacteria predict how many bacteria will be present after 16 h
postnew [5]

Answer:

After 16 hours bacterial count will be 11600.

Step-by-step explanation:

Bacterial growth is always an exponential growth in a given culture.So the formula for the growth will be

Final counts of bacteria = Initial counts × (rate of growth)^{time}

Given from first part Initial counts = 5000

Final counts= 6500 and time of growth = 5 hours

Then we will get the value of rate of growth of bacteria from the bacteria

⇒ 6500 = 5000×(rate)^{5}

(rate)^{5}= \frac{6500}{5000} = 1.3

Rate = \sqrt[5]{1.3} = 1.05

Now again to get the value of bacteria after 16 hours

Final Count = 5000×(1.05)^{16}

                   = 5000×2.32

                   = 11600


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