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Sauron [17]
3 years ago
8

Is a Unit rate the same thing as a Proportion?

Mathematics
1 answer:
Norma-Jean [14]3 years ago
8 0
The unit rate is also known as the constant of proportionality, but not as a proportion. 
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If P = (5,4), find the image of P under the following rotation. 90° counterclockwise about the origin ([?], [ ])​
ANTONII [103]

Answer: (-4,5)

Step-by-step explanation:

Rotating 90 deg. counterclockwise maps (x,y) onto (-y,x), so (5,4) maps onto (-4,5).

8 0
2 years ago
9.50 One way to evaluate the effectiveness of a teaching assistant is to examine the scores achieved by his or her students on a
EleoNora [17]

Answer:

Step-by-step explanation:

Given that a professor sets a standard examination at the end of each semester for all sections of a course. The variance of the scores on this test is typically very close to 300.

H_0: s^2 = 300\\H_a: s^2 \neq 300

(Two tailed test for variance )

Sample variance =480

We can use chi square test for testing of hypothesis

Test statistic = \frac{(n-1)s^2}{\sigma^2} \\=62.4

p value = 0.0100

Since p <0.05 our significance level, we reject H0.

The sample variance cannot be claimed as equal to 300.

5 0
3 years ago
A block of concrete is 1m long, 50cm wild and 4cm thick. 1.calculate the volume of the block in cm3 .2.if 1cm has a mass of 2.7g
Nonamiya [84]

9514 1404 393

Answer:

  • 20,000 cm³
  • 54 kg

Step-by-step explanation:

1 m is 100 cm, so the volume is ...

  V = LWH

  V = (100 cm)(50 cm)(4 cm) = 20,000 cm³ . . . volume

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The mass is ...

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The mass of the block is 54 kg.

7 0
3 years ago
Find the number described. What number is 16​% of 70​?
photoshop1234 [79]

Answer:

58.8

Step-by-step explanation:

multiply 16% by 70 then substract your answer by 70

4 0
2 years ago
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Kyle has a aquarium in the shape of a rectangular prism.The aquarium is 24 inches long and 10 inches wide. The volume of the aqu
jasenka [17]
To calculate to volume of a rectangular prism you use the formula l × w × h = V

l, w, and h are the sides, and V is the volume

So... 24 × 10 × h = 2,880

h = 2,880 / 240

h = 12


4 0
3 years ago
Read 2 more answers
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