Answer:
200 275 125 50 100 50= 800
Step-by-step explanation:
B is the correct answer i think
Answer:
a. 81.5%
Step-by-step explanation:
The z-score for 400 is ...
Z = (X -μ)/σ = (400 -500)/100 = -1
The z-score for 700 is ...
Z = (700 -500)/100 = 2
The empirical rule tells you that 68% of the distribution is within ±1σ of the mean, and 95% is within ±2σ of the mean. Half of that first number is in the range Z = -1 to 0, and half that second number is in the range Z = 0 to +2. So, the probability you want is ...
(1/2)(68%) + (1/2)(95%) = 81.5% . . . . matches choice A
?/8 = 3/?
Multiplying both sides by 8, then “?” gives
8? * ?/8 = 8? * 3/?
?*? = 24
The number, then, is sqrt(24), or 2 sqrt(6), which is approximately 4.90.
If it is : (x + 5) / 8 = 6
multiply both sides by 8, eliminating the 8 on the left side
x + 5 = 8 * 6
x + 5 = 48
x = 48 - 5
x = 43
if it is : x + (5/8) = 6
subtract 5/8 from both sides
x = 6 - 5/8
x = 48/8 - 5/8
x = 43/8 or 5 3/8
