She will have 66 white beads because 6 x 11 is equal to 66.
Answer: D) 77 mph to 117 mph
Step-by-step explanation:
Given that:
Mean serve speed(m) = 97 miles per hour
Standard deviation of serve speed = 10 mph
Shape of distribution is not known ; interval that will contain the speeds of at least three-fourths of the player's serves
Using Chebyshev's rule:
(1 - 1/k²) = 3 / 4
1 / k² = 3/4 - 1
- 1/k² = - 1 / 4
1/k² = 1/4
Cross multiply:
k² = 4
Square root of both sides :
k = 2
Hence, number of standard deviation = 2
(-k*sd) + m ; (k*sd)+m
(-2*10) + 97 ; (2*10)+97
-20 + 97; 20 + 97
77 ; 117
77mph ; 117mph
Answer:
Step-by-step explanation:
Use the formula for vertex form a(x+h)^2+k
Plug in the given vertex into the formula
So (x+0)^2-2
Since there is not a value for h the equation is just x^2-2
I hope this helps!