for the first one, multiply height times width times depth divided by two, since it is a triangle. Area of a triangle is always height times width divided by two.

(1.3 × 1 × 4)/2 = 2.6 ft³

The second one you can see as 6 of those triangle bars glued together, can you calculate the volume then?

4 0

3 years ago

A normally distributed population has a mean of 250 pounds

Dima020 [189]

Answer: 0.9746

Step-by-step explanation:

Given : A normally distributed population has a mean of 250 pounds and a standard deviation of 10 pounds.

i.e. $\mu=250$ $\sigma=10$

Sample size : n= 20

Let $\overline{x}$ sample mean values.

Then, the probability that this sample will have a mean value between 245 and 255 be

$P(245$

Hence , the probability that this sample will have a mean value between 245 and 255 is 0.9746 .

6 0

3 years ago