Answer:
a) The height of the image = 11.2 millimeters
b) The distance between the camera and her friend = 2.24 meters
Step-by-step explanation:
<u>Part A: find the height of the image:</u>
distance from the lens to the film = 24 millimeters
distance from the lens to the her friend = 3 meters = 3000 millimeters
height of her friend = 140 centimeters = 1400 mm
the height of the image = x
Using the similarity :
![\frac{x}{140} = \frac{24}{3000} \\x= \frac{140*24}{3000} = 1.12 cm = 11.2 mm.](https://tex.z-dn.net/?f=%5Cfrac%7Bx%7D%7B140%7D%20%3D%20%5Cfrac%7B24%7D%7B3000%7D%20%5C%5Cx%3D%20%5Cfrac%7B140%2A24%7D%7B3000%7D%20%3D%201.12%20cm%20%3D%2011.2%20mm.)
<u>Part B: find the distance between the camera and her friend</u>
If the height of the image on the film of her friend is 15 millimeters.
Let the the distance between the camera and her friend = y
![\frac{y}{24} = \frac{1400}{15} \\y = \frac{24 * 1400}{15} = 2,240 mm = 2.24 meters](https://tex.z-dn.net/?f=%5Cfrac%7By%7D%7B24%7D%20%3D%20%5Cfrac%7B1400%7D%7B15%7D%20%5C%5Cy%20%3D%20%5Cfrac%7B24%20%2A%201400%7D%7B15%7D%20%3D%202%2C240%20mm%20%3D%202.24%20meters)
The answer is b ...........................
Expected value equals sum of the product of each value and its possibility.
a.
1/2×75%+1/4×25%=0.4375
the expected value of grass growth for the day is 0.4375
b.
0.4375×31=13.5625
the expected value of grass growth for the month of july is 13.5625
Answer:
probability of getting yellow or red is 3/8
I think
You can simply use a calculator (or a piece of paper and pencil!) for this equation, which is nice since it’s easy once you know how :)
To find a percentage of a number, we’ll need to multiply.
12.4% x 57.5 = 7.13
Therefore 12.4 percent of 57.5 is equal to 7.13.
Hope this helps you! :)