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pantera1 [17]
3 years ago
10

Daniela measures her math book and records its width as 21.9 cm to the nearest tenth of a centimeter. The actual measurement of

the book’s width is 22.0 cm. What is the percent error of her measurement? Round your answer to the nearest tenth of a percent.
Mathematics
1 answer:
zalisa [80]3 years ago
6 0
The percent will be 481.8 so that will be the nearest tenth of a percent Hopes this help times or do simplfy.
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Solve the system of equations below by graphing both equations with a pencil and paper. What is the solution? y = -x + 21 y = -2
Kamila [148]
-x+21=-2x+30
-x+2x=-21+30
x=9
-(9)+21=12


y=12
4 0
2 years ago
The radius of a cylindrical vessel is 7 cm and height is 1400 m . Find the cost of painting its inner curved surface area at the
Olegator [25]

Answer:

Cost = 616000 DHS per square centimetre.

Step-by-step explanation:

curved surface of a cylinder = 2\pirh

r = 7 cm

h = 1400 m = 140000 cm

The outer curved surface area of the cylinder = inner curved surface area of the cylinder

The inner curved surface of the cylinder = 2\pirh

                                      = 2 x \frac{22}{7} x 7 x 140000

                                      = 2 x 22 x 1 x 140000

                                      = 6160000

The inner curved surface of the cylinder is 6160000 square centimetre.

But, the cost of painting is at the rate of 10 DHS per square centimetre.

The inner curved surface of the cylinder = 6.16 x 10^{6} square centimetre.

cost of painting the inner curved surface area = \frac{6.16*10^{6} }{10}

                                                                       = 616000 DHS per square centimetre

The cost of painting the inner surface is 616000 DHS per square centimetre.

6 0
2 years ago
An airplane pilot over the Pacific sights an atoll at an angle of depression of 5 . At this time, the horizontal distance from t
Aleonysh [2.5K]

Answer:

404.98 m

Step-by-step explanation:

The angle of depression is 5°

The horizontal distance from the airplane to the atoll is 4629 meters.

We need to find the height of the plane.

If we consider a triangle. 4629 meters will be the base and angle is 5°. Let h is the height of the plane. Using trigonometry to find it :

\tan\theta=\dfrac{x}{4629 }\\\\\tan(5)=\dfrac{x}{4629 }\\\\x=\tan(5)\times 4629 \\\\x=404.98\ m

So, the height of the plane is 404.98 m.

6 0
2 years ago
8 feet per second is
Contact [7]
Whats the choices?..............................................................................                                                                          
                                                                                                                              
3 0
3 years ago
Can someone explain me how to solve this?
sesenic [268]

Answer:

X=12

Step-by-step explanation:

since it is an isosceles triangle opposite sides are congruent which means 7x+24=13x-48 you then would need to subtract either the whole numbers or the variables from each side so add 48 on each side it equals to 7x+72=13x then subtract 7x from 13x and you get 72=6x divide both sides 6/6=x, 72/6 Therefore x=12 HOPE that helped mark me brainiest pls

3 0
2 years ago
Read 2 more answers
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