1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
andrey2020 [161]
2 years ago
12

scarlet is trying to find the height of a dam. she stands 90 meters away from the dam and records the angle of elevation to the

top of the dam to be 26 degrees. if scarlet is 1.65 meters tall how tall is the dam
Mathematics
1 answer:
Harlamova29_29 [7]2 years ago
5 0
Make a drawing with a right triangle.

The opposite side, y, is the height of the dam less 1.65 m

The base or adjacent side is 90 m

The angle between the two sides is 90 m.

Then tan (26) = y / 90

y = 90 tan(26) = 90 (0.4877) = 43.90 m

The height of the dam is 43.90m + 1.65m = 45.55 m
You might be interested in
What is 7/1 dividend by 14/3
katrin2010 [14]
7/1 x 3/14 = 21/14 = 3/2 = 1 1/2

The answer is 1 1/12 or 1.5, but I recommend the fraction way since the problem was in fractions!
4 0
3 years ago
Read 2 more answers
Please help so I can make my family proud
Levart [38]

Answer:

A = 83.5m^2

Step-by-step explanation:

9 * 19 = 171m for the complete rectangle

9 - 4 = 5

5 * 19 = 95

95 / 2 = <u>47.5m</u> for the triangles

9 * 4 = <u>36m</u>

36 + 47.5 = <u>83.5m</u>

<em><u>Plz mark as brainliest if correct! Have a nice day!!! </u></em>

<em><u>-Lil G</u></em>

8 0
2 years ago
Peter threw the football 72 feet. How many yards did he throw the football ?
Darya [45]

1 yard = 3 feet.

Divide total feet by 3 to get yards:

72 feet / 3 = 24 yards.

3 0
3 years ago
A buyer went to the market to buy strawberries. He purchased 120 randomly selected strawberries from a vendor who claimed that n
mafiozo [28]

Answer:

z=\frac{0.333 -0.25}{\sqrt{\frac{0.25(1-0.25)}{120}}}=2.10  

p_v =P(z>2.10)=0.018  

At 5% of significance we can conclude that the true proportion of strawberries damage is higher than 0.25

Step-by-step explanation:

Data given and notation

n=120 represent the random sample taken

X=40 represent the number of strawberries damaged

\hat p=\frac{40}{120}=0.333 estimated proportion of strawberries damaged

p_o=0.25 is the value that we want to test

\alpha represent the significance level

z would represent the statistic (variable of interest)

p_v represent the p value (variable of interest)  

Concepts and formulas to use  

We need to conduct a hypothesis in order to test the claim that no more than 25% of his total harvest of strawberries was damaged.:  

Null hypothesis:p\leq 0.25  

Alternative hypothesis:p > 0.25  

When we conduct a proportion test we need to use the z statistic, and the is given by:  

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

The One-Sample Proportion Test is used to assess whether a population proportion \hat p is significantly different from a hypothesized value p_o.

Calculate the statistic  

Since we have all the info requires we can replace in formula (1) like this:  

z=\frac{0.333 -0.25}{\sqrt{\frac{0.25(1-0.25)}{120}}}=2.10  

Statistical decision  

It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.  

The next step would be calculate the p value for this test.  

Since is a right tailed test the p value would be:  

p_v =P(z>2.10)=0.018  

At 5% of significance we can conclude that the true proportion of strawberries damage is higher than 0.25

6 0
3 years ago
Given the curve y=3x^5+6x^4-4x^3+1 find it's turning point and point of inflection
g100num [7]

Maximum and minimum turning points at (-2|33); (0.4|0.928) 

Inflection points at (-1.472|21.195); (0|1); (0.272|0.957)

3 0
3 years ago
Other questions:
  • A Wendy’s fast-food restaurant sells hamburgers and chicken sandwiches. On a typical weekday, the demand for hamburgers is norma
    14·1 answer
  • A school wants to build a rectangular playground that will have a diagonal length of 75 yards. How wide can the playground be if
    11·1 answer
  • Test for convergence
    12·1 answer
  • What temperature is 23 above freezing in fahrenheit
    9·2 answers
  • (2x-3)(x+2)-(3-2x)(3x-2)=0
    6·2 answers
  • Solve the equation.<br> 5x = 16<br> Solve for x
    9·2 answers
  • What is the product of (y + 3) and (7y – 1)?
    6·1 answer
  • Mark the statements about the truck pattern that are true. Select all that apply.
    8·2 answers
  • Function g is a transformation of the parent exponential function, . Which graph shows function g?
    9·1 answer
  • Which description best describes parallel lines?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!