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vladimir2022 [97]
3 years ago
10

On a picture the size of rectangular room is 5 cm by 7 cm. Actually the shorter side of the room is 6m. What is the scale of a p

icture and how long is the longer side of the room? SHOW YOUR WORK
Mathematics
1 answer:
taurus [48]3 years ago
8 0

Size of the room as depicted on the picture = 5 cm × 7 cm

Actual length of shorter side = 6 m

⇒ The size being shown at 5 cm is actually 6 m (or 600 cm)

⇒ In the picture, 1 cm represents \frac{600}{5} cm or 120 cm

Hence, the scale of the picture is 1 cm = 120 cm

⇒ Length of the longer side = 120 × 7 cm = 840 cm = 8.4 m

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Answer: C. (29,\ 37.8)

Step-by-step explanation:

The confidence interval for difference of two population mean is given by :-

\overline{x}_1-\overline{x}_2\pm z_{\alpha/2}\sqrt{\dfrac{s_1^2}{n_1}+\dfrac{s_2^2}{n_2}}

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n_1=30\ ;\ n_2=50\\\\\overline{x}_1=46.7\ ;\ \overline{x}_2=13.3\\\\s_1=9.2\ ;\ s_2=1.9

46.7-13.3\pm(2.576)\sqrt{\dfrac{9.2^2}{30}+\dfrac{1.9^2}{50}}\approx33.4\pm4.38=(29.02\ ,37.78)\approx(29,\ 37.8)

Hence,  a 99% confidence interval for the difference between the mean wait times of everyone who rode both rides (29,\ 37.8)

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4 years ago
Can someone help me graph this?
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3 years ago
Ab + 2b²<br> where<br> a = 7 b=4
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60

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hope this help
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3 years ago
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