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ira [324]
3 years ago
12

A ladder is leaning against a wall that is 20 ft tall. The base of the ladder is 30 ft from the wall. How long is the ladder?

Mathematics
2 answers:
vitfil [10]3 years ago
8 0
Its 30 feet long because its 30 ft from the base


creativ13 [48]3 years ago
3 0
15 ft. so bruh i hope this helps you
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Two friends, Neil and Charlie, are going to depart from their houses and ride their bikes towards each other until they meet, an
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Answer:

0.3 hour or 18 minutes

Step-by-step explanation:

How long means, we are to calculate the time(t)

Hence,

Speed × time = Distance

For Neil , 11 × t

For Charlie = 9 × t

11t + 9t = 6

20t = 6

t = 6/20

t = 0.3 hour

Converting to minutes

1 hour = 60 minutes

0.3 hour = x

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Therefore, it will take 0.3 hour or 18 minutes for these two to meet.

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4 4/10 divided by 4 2/3
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What is the median of the following set of numbers? 33, 30, 29, 28, 27, 34, 31
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Median is a middle value
So it is 28
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How many cubes of side 2cm can be fitted into a box 12 cm long, 8cm wide and 4cm high?
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Assume that you want to test the claim that the paired sample data come from a population for which the mean difference is μd =
swat32

Answer:

Test statistic, t_{s} = -0.603 (to 3 dp)

Step-by-step explanation:

Deviation, d = x -y

Sample mean for the deviation

\bar{d} = \frac{\sum x-y}{n}

\bar{d} = \frac{(28-6) + (31-27)+(20-26)+(25-25)+(28-29)+(27-32)+(33-33)+(35-34)}{8} \\\bar{d} = -0.625

Standard deviation: SD = \sqrt{\frac{\sum d^{2} - n \bar{d}^2}{n-1}  }

\sum d^{2}  = (28-26)^2 + (31-27)^2 +(20-26)^2 +(25-25)^2 +(28-29)^2 +(27-32)^2 +(33-33)^2 +(35-34)^2\\\sum d^{2}  = 63

SD = \sqrt{\frac{63 - 8 *  (-0.625)^2}{8-1}  }

SD =2.93

Under the null hypothesis, the formula for the test statistics will be given by:

t_{s} = \frac{ \bar{d}}{s_{d}/\sqrt{n}  } \\t_{s} = \frac{- 0.625}{2.93/\sqrt{8}  }

t_{s} = -0.6033

6 0
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