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erastova [34]
2 years ago
9

The times for Erin’s five laps around the track were 56.6 seconds, 57.9 seconds, 57.5 seconds, 65.3 seconds, and 65.7 seconds. U

sing rounding to the nearest whole second as the only estimation technique, what is the total estimated time for Erin’s five laps in seconds?
300
303
304
320
Mathematics
1 answer:
Evgesh-ka [11]2 years ago
7 0

Answer:

the correct answer should be c, 304

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The correct answer is option c
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Deffense [45]

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Whole number

Step-by-step explanation:

That's only because it is just 1 number that is gonna be there and i did some research too

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Solve for x and y:
Mariulka [41]

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D

Step-by-step explanation:

The lines are parallel, this means that they will never meet.

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The figure below shows a rectangle with a diagonal drawn.
Kipish [7]

Answer:

<u>Option B. sin(s) = cos(u)</u>

Step-by-step explanation:

The rest of the question is the attached figure.

Complementary angles - two angles that add to 90 degrees.

The sine of one of them will be equal to the cosine of other angle.

For the attached figure:

The set all complementary angles are:

  1. angle s and angle t
  2. angle u and angle v
  3. angle s and angle u
  4. angle t and angle v

We will check the options:

A. sin(t) = sin(u)  ⇒(<u>wrong</u>) because t and u are not complementary angles

B. sin(s) = cos(u) ⇒ (<u>True</u>) ⇒ s and u are complementary angles and sine of one of them will be equal to the cosine of other angle.

C. cos(s) = sin(v) ⇒(<u>wrong</u>) because t and u are not complementary angles

D. cos(t) = cos(v) ⇒(<u>wrong</u>) because t and v are complementary angles but sine of one of them should be equal to the cosine of other angle.

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3 0
3 years ago
Find the areas of the trapezoids
Gennadij [26K]

Answer:

figure 1 - 10.5 unit^2

figure 2 - 12 unit^2

Step-by-step explanation:

<u>figure 1</u>

1. find the area of the rectangle

<em>3*2 = 6 unit^2</em>

2. find the area of the triangle

<em>(3*3)/2 = 4.5 unit^2</em>

3. add the area of the rectangle and the area of the triangle together. The sum would be the area of the trapezoid.

<em>6 + 4.5 = </em><u><em>10.5 unit^2</em></u>

<u>figure 2</u>

1. find the area of the rectangle

<em>2*4 = 8 unit^2</em>

2. find the area of both triangles

<em>(1*4)/2 = 2 unit^2</em>

3. add the area of the rectangle and the area of both triangles together. The sum would be the area of the trapezoid.

<em>8 + 2 + 2 = </em><u><em>12 unit^2</em></u>

4 0
2 years ago
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