How many centimeters are there in 1 yard if there are 2.54 centimeters per inch show your work?

2 answers:

4 0

There are 36 inches in a yard and 2.54 centimeters per inch.
2.54•36= 91.44 centimeters
There are 91.44 cm in a yard.
Hope this helps.

Mariulka [41]3 years ago

3 0

Good morning from Canada! :D

What we know:
-there are 2.54cm per inch
-there is 1 yard
-1 yard=36 inches

Basically, this question is asking us to make simple conversions from centimeters to inches, based on how many centimeters there are in a yard.
All we need to do to find the number of centimeters is to multiply 36 (the number of inches per year) by 2.54 (the number of centimeters in an inch).

36×2.54=91.44cm

Therefore there are 91.44cm in 1 yard.

Hope this helps!

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48. Reading Rates The reading speed of sixth-grade students is approximately normal, with a mean speed of 125 words per minute a

son4ous [18]

Answer:

The reading speed of a sixth-grader whose reading speed is at the 90th percentile is 155.72 words per minute.

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 $\sigma$ , 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.

In this problem, we have that:

$\mu = 125, \sigma = 24$