For this case we must write a quadratic equation of the form:
We have two roots:
Thus, we can rewrite the equation in a factored form as:
If we apply distributive property we have:
Different signs are subtracted and the major sign is placed.
Answer:
The quadratic equation is:
Answer:
280
Step-by-step explanation:
Margin of error = critical value × standard error
Here, the margin of error is 2.
At 99% confidence, the critical value is z = 2.576.
The standard error is s / √n = 13 / √n.
2 = 2.576 (13 / √n)
2 = 33.49 / √n
√n = 16.74
n = 280.4
Rounded to the nearest person, the required sample size is 280.
Sheila had 11 marbles. She gave 4 to Bobby, 5 to Carla, and 2 to jenna.
Answer:
250
Step-by-step explanation:
Answer:
It's choice 2.
Step-by-step explanation:
The nth value is 1 more than twice the previous value
- for example, 15 = 2*7 + 1.
