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aleksley [76]
2 years ago
14

If you place a 39-foot ladder against the top of a building and the bottom of the ladder is 33 feet from the building how tall i

s the building?
Mathematics
2 answers:
RUDIKE [14]2 years ago
8 0

Answer:

20.78 feet

Step-by-step explanation:

39^{2} =h^{2} +33^{2} \\1521= h^{2} +1089\\h^{2}= 1521-1089\\h^{2} =432h= 20.78

Mice21 [21]2 years ago
7 0

Answer:

Formulate

Based on the given conditions, formulate:

\sqrt{3 {9}^{2} }  - 3 {3}^{2}

Evaluate

Evaluate the equation/expression:

20.78461

SO THE ANSWER IS 20.78461

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Find the slope of the line that passes through (-2,1) (7,1)​
stich3 [128]

Answer:

0

Step-by-step explanation:

To find the slope of a line, we uses y2-y1/x2-x1:

y2-y1/x2-x1

1-1/7+2

0/9

0

The slope of the line is 0.

<em>If u have any questions about what I did feel free to ask in the comments!</em>

3 0
2 years ago
Read 2 more answers
HELP THIS IS DUE TOMMAROW Can 1 1/4 be written as a percent. Explain?
s344n2d4d5 [400]

Answer: Yes, it is 125%

Step-by-step explanation:

4 0
3 years ago
There are `15` pieces of fruit in a bowl, and `6` of them are apples.
zalisa [80]

Answer:

40% of the pieces of fruit in the Bowl are apples.

Step-by-step explanation:

Given the statement:- There are 15 pieces of fruit in a bowl and six of them are apples.

⇒ Total number of pieces of fruit in a bowl = 15 pieces

and

Number of pieces of apple in a bowl = 6 pieces.

To find the percentage of the pieces of fruit in the Bowl are apples.

=

Therefore, 40% of the pieces of fruit in the Bowl are apples.

5 0
3 years ago
Read 2 more answers
Which angle is coterminal with 140°?​
Tpy6a [65]

Answer:

A

Step-by-step explanation:

Every 360 degrees (full circle) that you add or subtract from 140 is coterminal

140 + 360 = 500

7 0
2 years ago
Suppose that a new scoring system for universities was created which has a scale of 0-100. The scores on this system are normall
katrin2010 [14]

Answer:

We need a score of 77.8 or higher in order to stay in the top 10% of universities

Step-by-step explanation:

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Let X the random variable that represent the scores of a population, and for this case we know the distribution for X is given by:  

X \sim N(65,\sqrt{100}=10)  

Where \mu=65 and \sigma=10 minutes.  

And we want the top 10% of universities, so we need a value a such that:

P(X>a)=0.10 or P(X

We need on the right tail of the distribution a value a that gives to us 90% of the area below and 10% of the area above. Both conditions are equivalent.

Let's use the condition P(X, the best way to solve this problem is using the z score with the following formula:

z=\frac{x-\mu}{\sigma}

So we need a value from the normal standard distribution that accumulates 0.90 of the area on the left and 0.10 on the right. This value on this case is 1.28 and we can founded with the following code in excel:

"=NORM.INV(0.90,0,1)"

If we apply the z score formula to our case we have this:

P(X

So then based on the equalities we have this:

\frac{a-65}{10}=1.28

And if we solve for a we got:

a=(10*1.28) +65=77.8

So then we need a score of 77.8 or higher in order to stay in the top 10% of universities

3 0
3 years ago
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