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Travka [436]
3 years ago
11

A rectangle has a perimeter of 30. It is dilated by a scale factor of 2.

Mathematics
1 answer:
LuckyWell [14K]3 years ago
5 0

Answer:

It is 60.

Step-by-step explanation:

When shapes are dilated (when they get bigger or smaller), perimeter changes linearly—in direct proportion with length. This means if the scale factor is 2, then you multiply it by 2. 2 multiplied by 30 equals 60.

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12

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3 years ago
The price of a television set on scale is $360. This two thirds of the regular price. Find the regular price.
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Step-by-step explanation:

3 0
3 years ago
Work out <br><br> 5 3/4 - 2 1/4
Klio2033 [76]

Answer:

3  1/2

Step-by-step explanation:

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2 years ago
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Vitek1552 [10]

Answer:

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3 0
3 years ago
Last year, the mean running time for a certain type of light bulb was 8.5 hours. This year, the manufacturer has introduced a ch
Free_Kalibri [48]

Answer:

H0 : μ = 8.5

H1 : μ > 8.5

1 sample t test ;

Test statistic = 2.53

Pvalue = 0.994

No, we fail to reject the Null ;

There is no significant evidence to support the Claim that the mean running time of light bulb is greater Tha last year.

Step-by-step explanation:

H0 : μ = 8.5

H1 : μ > 8.5

Test statistic :

(xbar - μ) ÷ (s/sqrt(n))

(8.7 - 8.5) ÷ (0.5 / sqrt40)

Test statistic = 2.53

The Pvalue :

P(Z < 2.53) = 0.9943

Pvalue = 0.994

Decison region :

Reject H0 ; if Pvalue < α

0.9943 > 0.05 ; We fail to reject the Null

5 0
3 years ago
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