Kevin is taking a two-part test in social studies

The radius of the circle above is 36 mm. What is the circumference of the circle? (Use = 3.14.)

Vsevolod [243]

Answer:

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4 0

3 years ago

Which set of ordered pairs could represent a linear function <br><br> (please help!!)

vlabodo [156]

The answer is A- (3,5), (5,1), (7,-2), (9,-6)

4 0

3 years ago

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Who can answer this question for me please

sineoko [7]

Answer:

B

Step-by-step explanation:

6 0

3 years ago

The graph shows the height of a plant over time. What is the unit rate?

Anna35 [415]

Answer: unit rate = 1 / 5 = 0.2 inches per day

Step-by-step explanation:

The unit rate is the ratio that describes how one quantity changes as the other changes.You can find a unit rate from a graph the same way you find the slope.

1. Choose two points on the graph to find the slope

- (0,0) and (5,1)

x₁ y₁ x₂ y₂

2. Slope = y₂ - y₁ / x₂ - x₁ (This is essentially the change in y-coordinates divided by the change in x-coordinates.

unit rate = y₂ - y₁ / x₂ - x₁

unit rate = 1 - 0 / 5 - 0

unit rate = 1 / 5 = 0.2 inches per day

8 0

4 years ago

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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 $X = 55.5, Z = -0.5$