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soldier1979 [14.2K]
2 years ago
7

In sunlight, a vertical stick 6 ft tall casts a shadow 2 ft long. At the same time a nearby tree casts a shadow 14 ft long. How

tall is the tree? Round to the nearest tenth.

Mathematics
1 answer:
Nostrana [21]2 years ago
8 0

Answer:

42.0 ft

Step-by-step explanation:

let t be the height of the tree.

<u><em>At the same time ,the measure of something </em></u>

<u><em>and its shadow are proportional</em></u> .

Then

\frac{2}{6} =\frac{14}{t}

Then

2t = 6 × 14

Then

2t = 84

Then

t = 84/2

Then

t = 42

Therefore the tree is 42 ft tall

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You are 16 or 16 and a half about to be 17
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3 years ago
A multiple choice exam has ten questions. Each question has five possible answers, of which one is correct. Suppose that a stude
Ber [7]

Answer:

8.81% probability that the student answers exactly 4 questions correctly

Step-by-step explanation:

For each question, there are only two possible outcomes. Either he answers it correctly, or he does not. The probability of answering a question correctly is independent of other questions. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

A multiple choice exam has ten questions.

This means that n = 10

The probability of answering any question correctly is 0.20.

This means that p = 0.2

What is the probability that the student answers exactly 4 questions correctly

This is P(X = 4).

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 4) = C_{10,4}.(0.2)^{4}.(0.8)^{6} = 0.0881

8.81% probability that the student answers exactly 4 questions correctly

4 0
4 years ago
The sum of three consecutive odd integers is 327. find the integers
omeli [17]
The equation for this problem would be
x+(x+2)+(x+2+2)=327
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3x=321
x= 107
so the answers would be 107, 109 and 111
8 0
3 years ago
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