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tatyana61 [14]
3 years ago
14

Perform these calculations, following the rules for significant figures.

Mathematics
2 answers:
xeze [42]3 years ago
5 0
For addition and subtraction the answer should have the same number of decimal places as the least number of decimal places involved in the operation. For multiplication and division the number of significant value of the answer should be the same as the least number of significant values of the involved numbers.

a. 26 x 0.02584 = 0.67
b. 15.3: 1.1 = 14
c. 782.45 - 3.5328 = 778.92
d. 63.258 + 734.2 = 797.5
Dmitrij [34]3 years ago
4 0

Answer:

polar bear

Step-by-step explanation:

black bear

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So if 2 notebooks cost 12 divide that
12/2 =6 $ each
So to check if its true the 3notebooksx $6 dollars each should =$18 for 3 notebooks
5 notebooks at $6 each = $30 for 5 notebooks
so What is 4notebooks x$6 each ? =4x6 = $24 for 4 notebooks
8 0
3 years ago
3. Marcus had an average score of 90% on two biology tests about protists. If his first test score was 96%, which score did he r
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Answer:

B: 84%

Step-by-step explanation:

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ehidna [41]

Answer:

x=13

Step-by-step explanation:

Switch sides:

2x−9=17

Add 9 to both sides:

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8 0
3 years ago
Find the sum. Express your answer in simplest form. 9a^2-5/b^2+2 + -2a^2+4/b^2+2
KonstantinChe [14]

Answer:

Step-by-step explanation:

\frac{9a^{2}-5}{b^{2}+2}+\frac{-2a^{2}+4}{b^{2}+2}=\frac{9a^{2}-5-2a^{2}+4}{b^{2}+2}\\\\=\frac{9a^{2}-2a^{2}-5+2}{b^{2}+2}\\\\=\frac{7a^{2}-3}{b^{2}+2}

5 0
3 years ago
Student Practice: Follow the steps in the example.
Sergio039 [100]

Answer:

1) Option B - 25.12 ft

2) Option C - 24.1 ft

Step-by-step explanation:

1) Given : The circular rug has a diameter of 8.2 feet.

To find : Which measurement is closest to the  circumference of the rug in feet?

Solution :

The circumference of rug is given by C=\pi d

Where, d is the diameter = 8.2 feet.

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The most closest measurement is 25.12 ft.

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Solution :

The circumference of circle is given by C=\pi d

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The most closest measurement is 24.1 ft.

Therefore, option C is correct.

7 0
3 years ago
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