Answer: 20
Step-by-step explanation:
We assume that the heights of boys in a high school basketball tournament are normally distributed.
Given : Mean height of boys : 
inches.
Standard deviation: 
inches.
Let x denotes the heights of boys in a high school basketball tournament .
Then the probability that a boy is taller than 70 inches will be :-
![P(x> 70)=1-P(x\leq70)\\\\=1-P(\dfrac{x-\mu}{\sigma}\leq\dfrac{70-70}{2.5})\\\\=1-P(z\leq0)=1-0.5=0.5\ \ \text{[by using z-value table]}](https://tex.z-dn.net/?f=P%28x%3E%2070%29%3D1-P%28x%5Cleq70%29%5C%5C%5C%5C%3D1-P%28%5Cdfrac%7Bx-%5Cmu%7D%7B%5Csigma%7D%5Cleq%5Cdfrac%7B70-70%7D%7B2.5%7D%29%5C%5C%5C%5C%3D1-P%28z%5Cleq0%29%3D1-0.5%3D0.5%5C%20%5C%20%5Ctext%7B%5Bby%20using%20z-value%20table%5D%7D)
Now, the expected number of boys in a group of 40 who are taller than 70 inches will be :-
Hence, the expected number of boys in a group of 40 who are taller than 70 inches=20
Perimeter is 2 times the length plus 2 times the width.
Area is length times width.
Perimeter = (2 x 20) + (2 x 15) = 40 + 30 = 70 inches.
Area = 20 x 15 = 300 square inches.
Step-by-step explanation:
can you put a pic or somthin cause it says which equation but idc the choices
Answer:
$47.50
Step-by-step explanation:
75 times 30 is 2,250, so then we put back the decimal and its 22.50, add that to 25.00, your answer is 47.50
Answer:
24,48,72,96,120,144,168,192,216,240,264,288,312,336,360,384,408,432,456,480,504,528,
Step-by-step explanation:
hope this helps you sorry for the extra :)
