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
Igoryamba
2 years ago
7

Find the area of the polygon. A = __ft squared

Mathematics
1 answer:
Nataliya [291]2 years ago
8 0

Answer:

28.5^2

Step-by-step explanation:

The formula is, b(base)+c(height)= b+c over 2.  b+c/2.

B=19ft in this problem.

C=38ft

Knowing this, we can further simplify.

19+38/2

Now, we add 19 and 38.

(57)

57/2= 28.5

So, the anwser is 28.5^2

You might be interested in
Find parametric equations for the line through point P(-4,5,2) in the direction of the vector (-6,6,-5)
tigry1 [53]

The vector <em>v</em> (-6, 6, -5) points in the direction of itself, so we start there.

We can capture all points on the line through the origin and the point (-6, 6, -5) by scaling <em>v</em> by an arbitrary real number <em>t</em>.

The line through point <em>P</em> and pointing in the same direction as <em>v</em> is parallel to the other line that passes through the origin. Then the line we want can be obtained by translating the line through the origin by a vector <em>p</em> that points to (-4, 5, 2), so the vector equation for this line is

<em>r </em>(<em>t </em>) = <em>p</em> + <em>t v</em>

<em>r </em>(<em>t </em>) = (-4, 5, 2) + <em>t</em> (-6, 6, -5)

<em>r </em>(<em>t </em>) = (-4 - 6<em>t</em>, 5 + 6<em>t</em>, 2 - 5<em>t</em> )

To get the parametric equations, simply take out the components:

<em>x</em> (<em>t</em> ) = -4 - 6<em>t</em>

<em>y </em>(<em>t</em> ) = 5 + 6<em>t</em>

<em>z</em> (<em>t</em> ) = 2 - 5<em>t</em>

4 0
3 years ago
Evaluate the expression.<br> 38 +16 - 12 - 2 - (302)<br> Enter your answer in the box.
masha68 [24]

Answer:

-262

Step-by-step explanation:

Evaluate Subtraction & Addition from right to left [or left to right, as long as you know what you are doing]:

38 + 16 - 12 - 2 - 302

|_______||____________|

44 - 316 =  -262

I am joyous to assist you anytime.

5 0
3 years ago
A researcher wants to estimate the percentage of all adults that have used the Internet to seek pre-purchase information in the
Lubov Fominskaja [6]

Answer:

The required sample size for the new study is 801.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

The margin of error is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

25% of all adults had used the Internet for such a purpose

This means that \pi = 0.25

95% confidence level

So \alpha = 0.05, z is the value of Z that has a pvalue of 1 - \frac{0.05}{2} = 0.975, so Z = 1.96.

What is the required sample size for the new study?

This is n for which M = 0.03. So

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.03 = 1.96\sqrt{\frac{0.25*0.75)}{n}}

0.03\sqrt{n} = 1.96\sqrt{0.25*0.75}

\sqrt{n} = \frac{1.96\sqrt{0.25*0.75}}{0.03}

(\sqrt{n})^2 = (\frac{1.96\sqrt{0.25*0.75}}{0.03})^2

n = 800.3

Rounding up:

The required sample size for the new study is 801.

4 0
2 years ago
A florist uses 10 red roses for every 4 white roses in her bouquets. What is the ratio of red roses to the total number of flowe
Kruka [31]
10:14 or 10 to 14

The total number of roses is 14 and there are 10 red roses. For every 14 roses there are 10 red roses.
5 0
3 years ago
Read 2 more answers
​3 ​/​10 ​​ = ​9 /​k ​​ what is k
NemiM [27]
In order to isolate k, we would first cross multiply
3*k=9*10
3k=90

Then to isolate k, we would divide both sides by 3 to get:
K=30

Hope this helps
3 0
3 years ago
Read 2 more answers
Other questions:
  • Jasmine has a gross pay of $754.80. By how much will Jasmine’s gross pay be reduced if she has the following items withheld? fed
    12·2 answers
  • Maria studied the traffic trends in India. She found that the number of cars on the road increases by 10% each year. If there we
    13·1 answer
  • Which expression is equivalent to 2 (14x-3y+28x+12.2-5y-17.5)?
    14·2 answers
  • a shop advertised a 23% off Sale.if a coat originally sold for $256, find the decrease in price and the sale price.
    9·2 answers
  • Suppose you need to remove a nail from a board by using a claw hammer. What is the input distance for a claw hammer if the outpu
    13·1 answer
  • The side lengths 9, 13, and 17 form a triangle. true or false please answer ill do anything
    14·1 answer
  • Find compound Interest on 10000 for 2 years on 4% intrest compounded half yearly
    13·2 answers
  • Where do you see rotation in our lives/world?
    5·2 answers
  • Is -2/7 a natural number whole number integer rational number irrational number or real number
    11·2 answers
  • I have sum free ...... point s for yalll​
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!