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3 years ago

150 seconds is >, <, or = 3 minutes

Mathematics

2 answers:

kap26 [50]3 years ago

4 0

Answer:

150 seconds< 3 minutes

Step-by-step explanation:

a minute is 60 seconds; 60×3 =180

180 seconds is greater than 150 seconds

Vladimir79 [104]3 years ago

4 0

Answer:

1 min = 60 seconds

3 min = 60*3 = 180 seconds

Therefore, 150 seconds < 3 minutes

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3 years ago

In 1982 Abby’s mother scored at the 93rd percentile in the math SAT exam. In 1982 the mean score was 503 and the variance of the

oksian1 [2.3K]

Answer:

The percentle for Abby's score was the 89.62nd percentile.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation(which is the square root of the variance) $\sigma$ , the zscore of a measure X is given by:

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

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Abby's mom score:

93rd percentile in the math SAT exam. In 1982 the mean score was 503 and the variance of the scores was 9604.

93rd percentile. X when Z has a pvalue of 0.93. So X when Z = 1.476.

$\mu = 503, \sigma = \sqrt{9604} = 98$