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WITCHER [35]
3 years ago
9

How many people are on earth ?

Mathematics
1 answer:
mixas84 [53]3 years ago
3 0

Answer:

7 billion but it's getting close to 8 billion

Step-by-step explanation:

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A tree with a height of 4 ft casts a shadow 15ft long on the ground how tall is another tree that cast a shadow which is 20ft lo
wariber [46]

Height of another tree that cast a shadow which is 20ft long is 5 feet approximately

<h3><u>Solution:</u></h3>

Given that tree with a height of 4 ft casts a shadow 15ft long on the ground

Another tree that cast a shadow which is 20ft long

<em><u>To find: height of another tree</u></em>

We can solve this by setting up a ratio comparing the height of the tree to the height of the another tree and shadow of the tree to the shadow of the another tree

\frac{\text {height of tree}}{\text {length of shadow}}

Let us assume,

Height of tree = H_t = 4 feet

Length of shadow of tree = L_t = 15 feet

Height of another tree = H_a

Length of shadow of another tree = L_a = 20 feet

Set up a proportion comparing the height of each object to the length of the shadow,

\frac{\text {height of tree}}{\text {length of shadow of tree}}=\frac{\text { height of another tree }}{\text { length of shadow of another tree }}

\frac{H_{t}}{L_{t}}=\frac{H_{a}}{L_{a}}

Substituting the values we get,

\frac{4}{15} = \frac{H_a}{20}\\\\H_a = \frac{4}{15} \times 20\\\\H_a = 5.33

So the height of another tree is 5 feet approximately

8 0
3 years ago
How do I solve this?
ohaa [14]

Answer:

Step-by-step explanation:

x=e^{2t}-1\\y=e^t\\squaring\\\\y^{2}=e^{2t}\\Hence ~x=y^{2}-1

5 0
3 years ago
7g - 6 = -20 what is the answer
Brut [27]

7g - 6 = -20

Add 6 to both sides

7g = -14

Divide both sides by 7
g = -2


answer: g = -2

7 0
2 years ago
Read 2 more answers
Simplify the expression below. ​
Novay_Z [31]

Answer:

\displaystyle 6

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Step-by-step explanation:

<u>Step 1: Define</u>

<u />\displaystyle \frac{7^2 - 13}{24 - 18}<u />

<u />

<u>Step 2: Evaluate</u>

  1. [Fraction] Exponents:                     \displaystyle \frac{49 - 13}{24 - 18}
  2. [Fraction] Subtract:                         \displaystyle \frac{36}{6}
  3. [Fraction] Divide:                             \displaystyle 6
5 0
3 years ago
Can someone help me solve this problem, please!
jok3333 [9.3K]
Answer is 22.25, hope this helps!!
7 0
2 years ago
Read 2 more answers
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