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stellarik [79]
3 years ago
14

Find the surface area of the figure below. (attached image)

Mathematics
1 answer:
PIT_PIT [208]3 years ago
4 0

Answer:

Surface area = 969mm squared

Step-by-step explanation

Front: 170mm

Back: 170mm

Right side: 170mm

Left side: 170 mm

Bottom: 289mm

Total: 969mm

Hope this helps!

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A recent study reported that high school students spend an average of 94 minutes per day texting. Jenna claims that the average
larisa [96]

Answer:

We have sufficient evidence to support the claim that the average for the students at Jenna's large high school is greater than 94 minutes.

Step-by-step explanation:

Jenna claims that the average time of texting at her larger high school is greater than 94 minutes per day.

From here we can see that we have to perform a hypothesis test about a sample mean. The null and alternate hypothesis will be:

Null Hypothesis: \mu \leq  94

Alternate Hypothesis: \mu > 94

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Sample Size = n = 32

Sample Mean = x = 96.5

Sample Standard Deviation = s = 6.3

We have to perform a hypothesis test, to test Jenna's claim. Since, the value of Population Standard Deviation is unknown and the value of Sample Standard Deviation is known, we will use One Sample t-test in this case.

The formula to calculate the test statistic is:

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Using the values, we get:

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We have sufficient evidence to support the claim that the average for the students at Jenna's large high school is greater than 94 minutes.

3 0
3 years ago
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