784/ 93 = 8.43010752688
93 * <span>8.43010752688 = 784</span>
62 because 90 minus 15, minus 13, is equal to 62
Answer: A. 664
Step-by-step explanation:
Given : A marketing firm is asked to estimate the percent of existing customers who would purchase a "digital upgrade" to their basic cable TV service.
But there is no information regarding the population proportion is mentioned.
Formula to find the samples size , if the prior estimate to the population proportion is unknown :

, where E = Margin of error.
z* = Two -tailed critical z-value
We know that critical value for 99% confidence interval =
[By z-table]
Margin of error = 0.05
Then, the minimum sample size would become :

Simplify,

Thus, the required sample size= 664
Hence, the correct answer is A. 664.
Answer:
3x^2 - 11x - 4
Step-by-step explanation:
( x - 4 ) ( 3x + 1 )
= 3x^2 + x - 12x - 4
= 3x^2 - 11x - 4
<u><em>Hope this helps :)</em></u>