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
mina [271]
2 years ago
9

Kahn academy question:

Mathematics
1 answer:
Rufina [12.5K]2 years ago
8 0

Answer:

  2.97×10³

Step-by-step explanation:

3600 - 6.3×10² = 3600 -6.3×100 = 3600 -630 = 2970

  = 2.97×1000

  = 2.97×10³

_____

Your calculator can accept and display numbers in scientific notation.

You might be interested in
Marcus has 731 books he puts about the same number of books each of nine shelves in a bookcase about how many books are on each
defon

Answer:

81 books

Step-by-step explanation:

If you divide 731 into 9 you'll get 81.2

so that means you have 2 books left over that wont be on the shelf

so you'll have to round to 81

8 0
3 years ago
Need help on these trig homework
allochka39001 [22]

8. The length of the support is 7. 9 m

9. The length of the conveyer is 12m

3. a = 59m

A = 44°

B = 52°

4. c = 88. 6 mm

b = 49. 1 m

B = 34°

<h3>How to solve the trigonometry</h3>

8. We have the angle to be 20 degrees

Opposite side = x

hypotenuse = 23m

Using the sine ratio

sin θ = opposite/ hypotenuse

sin 20 = \frac{x}{23}

Cross multiply

sin 20 × 23 = x

x = 0. 3420 × 23

x = 7. 9 m

The length of the support is 7. 9 m

9. The angle of elevation is 37. 3 degrees

Hypotenuse = 19 . 0m

Opposite = x

Using the sine ratio

sin θ = opposite/ hypotenuse

sin 37. 3 = \frac{x}{19}

cross multiply

x = 0. 6059 × 19

x = 11.5

x = 12 m in 2 significant figures

The length of the conveyer is 12m

3. To determine the sides and angles, we use the sine rule;

\frac{a}{sin A} = \frac{b}{sin B} = \frac{c}{sin C}

For side a, we use the Pythagorean theorem

c^2 = a^2 + b^2

85^2 = a^2 + 67^2

a = \sqrt{89^2-67^2}

a = \sqrt{3432}

a = 58. 58, a = 59m

To find angle A and B, use the sine rule

\frac{59}{sin A } = \frac{85}{sin 90}

cross multiply

sin A × 85 = sin 90 × 59

make sin A subject of formula

sin A = \frac{59}{85}

sin A = 0. 6941

A = sin^-^1(0. 6941)

A = 44°

\frac{67}{sin B} = \frac{85}{sin 90}

cross multiply

sin B × 85 = sin 90 × 67

make sin b subject of formula

sin B = \frac{67}{85}

sin B = 0. 7882

B = sin^-^1( 0. 7882)

B = 52°

4. To find the sides, we use the sine rule;

\frac{74. 0}{sin 56. 6} = \frac{c}{sin 90}

Cross multiply

sin 56. 6 × c = sin 90 × 74

make 'c' subject of formula

c = \frac{74}{0. 8348}

c = 88. 6 mm

To find length b, we use the Pythagorean theorem

c^2 = a^2 + b^2

b^2 = c^2 - a^2

b^2 = 88. 8^2 - 74^2

b = \sqrt{7885. 44 - 5476}\\\\ b = \sqrt{2409. 44}

b = 49. 1 m

\frac{74. 0}{sin 56. 6} = \frac{49. 1}{sin B}

cross multiply

sin B = \frac{40. 99}{74. 0}

B = sin^-^1(0. 5539)

B = 34°

Learn more about trigonometric identity here:

brainly.com/question/7331447

#SPJ1

3 0
1 year ago
A rectangular swimming pool is 4 ft deep. One side of the pool is 3.5 times longer than the other. The amount of water needed to
sukhopar [10]

Answer: npo

Step-by-step explanation:

5 0
3 years ago
How do you find the area of the regular figure
snow_lady [41]

Answer:

Length times width

Step-by-step explanation:

l*w

5 0
3 years ago
Read 2 more answers
Please answer it thank you
AnnyKZ [126]

Answer:

C, linear

Step-by-step explanation:

C is the only one with the (1,8) corriant

And it is linear because it has a pattern

5 0
2 years ago
Read 2 more answers
Other questions:
  • Need help on 18 please!!!!!!
    10·1 answer
  • If there are 21 values in a data set in order from smallest to largest, what is the first quartile of the data set
    6·1 answer
  • A certain shade of pink is created by adding 3 cups of white paint to 2 cups
    14·1 answer
  • A segment with endpoints on the circle is a _____.
    5·1 answer
  • Can someone help me with this one please
    7·1 answer
  • What is the correct first step for solving this equation -5(4x-7)+8=3x
    13·2 answers
  • What equal 126 in multiple chart
    11·1 answer
  • In the diagram, WX, XY and YZ are three sides of a regular polygon A.
    6·1 answer
  • \sqrt{2x^2}\cdot \sqrt{4x}
    9·1 answer
  • Simplify and state the excluded values.<br> 126 -40
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!