**Answer:**

Lol I learned about this today in class, but I couldnt pay attention cuz I started crying about something

**Step-by-step explanation:**

**Answer:**

D. A value of 0.9 is more than 2 standard deviations from the mean.

**Step-by-step explanation:**

A is wrong, because the standard deviation is +/-0.15 (the measure up or down from the mean)

B is wrong, because the mean is exactly 0.5

C is wrong, because 1 standard deviation up from the mean is 0.65, and 0.7 is outside of that.

First, we can combine the like terms here, which is 113 and 146 to get 259. Now, we turn it into a fraction to get 259/402, **and that's your answer**

**Answer:**

The measure of angle x is 122.5 degrees.

The measure of angle y is 57.5 degrees

**Step-by-step explanation:**

180=y+x

y=x-65

180= (x-65)+x

180=2x-65

245=2x

x=122.5

y=122.5-65= 57.5

For us to know the wingspan of the model that was brought by Carla, we need to multiply the total wingspan of the Wright brothers' flyer to the scale factor that was given. The equation will be [ 48 inches * 1/40 = 1.2 inches ]. The answer is 1.2 inches.