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3 years ago

USing the net below, Find the surface area of the triangular prism.

Mathematics

1 answer:

Luda [366]3 years ago

8 0

Answer:

Area of a triangle=1/2bh

>>1/2×3×6=9

Area of rectangle=L×B

=7*6=42

=7×4=28

Surface Area=2(9)+2(42)+2(28)

=18+84+56=158cm^2

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Which critical value is appropriate for a 99% confidence level where nequals17, sigma is unknown, and the population appears

My name is Ann [436]

Answer:

t Subscript alpha divided by 2 = 2.921

Step-by-step explanation:

With sample sizes lower than 30, we use the t-test.

Otherwise, we use the z-test.

Here, n = 17

So we use the t-test.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 17 - 1 = 16

Now, we have to find a value of T, which is found looking at the t table, with 16 degrees of freedom(y-axis) and a confidence level of 0.99( $t_{1 - (\frac{1-0.99}{2}}) = 0.995$ ). So we have T = 2.921

So the correct answer is:

t Subscript alpha divided by 2 = 2.921

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