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2 years ago

Which is greater 30% of 30 or 28% of 32 ? You must show your working.

Mathematics

2 answers:

seropon [69]2 years ago

7 0

Answer:

30% of 30 > 28% of 32

Step-by-step explanation:

30% of 30:

0.3 x 30 = 9

28% of 32:

0.28 x 32 = 8.96

9 > 8.96

Alborosie2 years ago

5 0

Answer:

30% of 30 = 9

28% of 32 = 8.96

Step-by-step explanation:

0.30 x 30 = 9

0.28 x 32 = 8.96

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If YW bisects XYZ and mZXYW = 25°, then what is mZXYZ?

Alisiya [41]

Answer:

50°

Step-by-step explanation:

Since, YW bisects angle XYZ.

$\therefore m\angle XYZ =2\times m\angle XYW\\\therefore m\angle XYZ =2\times 25\degree \\\huge \purple {\boxed {\therefore m\angle XYZ =50\degree}}$

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2 years ago

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2 years ago

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Irina-Kira [14]

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2 years ago

Proportions in Triangles (5)

slava [35]

Answer:

3 1/3

Step-by-step explanation:

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2 years ago

The amount of time all students in a very large undergraduate statistics course take to complete an examination is distributed c

Anestetic [448]

Answer:

a) The mean is $\mu = 60$

b) The standard deviation is $\sigma = 9$

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

The probability a student selected at random takes at least 55.50 minutes to complete the examination equals 0.6915.

This means that when X = 55.5, Z has a pvalue of 1 - 0.6915 = 0.3085. This means that when $X = 55.5, Z = -0.5$