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Komok [63]
3 years ago
7

Find the surface area of the trapezoidal

Mathematics
1 answer:
Fofino [41]3 years ago
6 0

Answer:

916 in.

Step-by-step explanation:

Step by Step.

5*10 = 50, and 50*2 = 100

10*4 = 40, and 40 * 2 = 80

(4*6)/2 = 12, and 12 * 2 = 24

10*10 = 100, and 100 * 2 = 200

16*16 = 256, and 256 * 2 = 512

Adding this together, we get: 916 inches.

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A news agency publishes results of a recent poll. It reports that candidate A leads candidate B by 10% because 45% of the poll p
natali 33 [55]

We need to use the formula to find Margin of Error but through the sample proportion, that is

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

We will use a 95% confidence interval, that is a z value of 1.96 (Search in a Normal distribution table)

A) For A our \hat{p} (proportion) is equal to 0.45. So applying the formula,

E=1.96*\sqrt{\frac{0.45(1-0.45)}{900}}

E=3.25\%

B) We make the same of point A, but change our proportion to 0.35

E=1.96*\sqrt{\frac{0.35(1-0.35)}{900}}

E=3.116\%

c) We need to calculate the SE through proportion for 0.1, that is

SE = \sqrt{(\frac{\hat{p_1}(1-\hat{p_1})}{n})+(\frac{\hat{p_2}(1-\hat{p_2})}{n})}

Then our Error is given by,

E=z*SE

E=1.96*\sqrt(0.45*\frac{0.55}{900}+0.35\frac{0.65}{900}

E=0.045

7 0
3 years ago
Find a number which decreased by 24 equals 3 times it’s opposite
Nata [24]

x - 24 = 3 (-1) x

x - 24 = -3x

-24 = -4x

x = 6

Step-by-step explanation:

6 0
3 years ago
Y/7=2 <br> helpppppppppppppp
Natali5045456 [20]

Answer:

y=14

Step-by-step explanation:

1.Multiply all terms by the same value to eliminate fraction denominators

2. Simplify it and it gives you 14

6 0
2 years ago
Need help soon plz,
astra-53 [7]

Step-by-step explanation:

Find two points on the line.

20 is a multiple of both 4 and 5, so the points (5, 0) and (0, 4) are on the line.

Click those two points and you have your line!

7 0
3 years ago
Find the height of a rectangular prism if the surface are is 288 square centimetres and the base has a length of 4 centimetres a
liraira [26]
The rectangular prism below is made up of 6 rectangular faces, and the faces opposite to each other are have an equal area.
The area of one of the faces is lxh or lh, and the area of the face opposite to it is also equal, so the area of those two equal faces is 2lh.
The area of the base of the prism is lxw, and the area of its opposite face is equal, so the area of those two equal faces is 2lw.
The area of the face in the left side of the prism is wxh, and the area of the face opposite to it is also equal, so their combined area is 2wh.
So, to find the total surface area of a rectangular prism, we’d add the sum of all the rectangular faces, so the formula of finding the surface area of a rectangular prism=
2lh+2lw+2wh
=2(lh+lw+wh)
Given,
Surface area of the rectangular prism=288 cm^2
2(lh+lw+wh)=288
2[4h+(4x9)+9h)]=288
4h+(4x9)+9h=288/2
4h+(4x9)+9h=144
13h+36=144
13h=144-36
13h=108
h=108/13
h=8.308 cm
Hope this helps!

8 0
3 years ago
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