Answer:
1167 of them are girls in the first situation.
1052 of them are boys in the second situation.
Step-by-step explanation:
Since there are 2723 students at the school and 4/7 of them are boys, the number of boys:
→ 2723 x = 1556
The number of the girls = Total number of students - The number of boys
→ 2723 - 1556 = 1167
Since there are 2367 students at the school and 5/9 of them are girls, the number of girls
→ 2367 x = 1315
The number of the boys = Total number of students - The number of girls
→ 2367 - 1315 = 1052
Answer:
The sample size is
Step-by-step explanation:
From the question we are told that
The margin of error is
The standard deviation is
From the question we are told the confidence level is 94% , hence the level of significance is
=>
Generally from the normal distribution table the critical value of is
Generally the sample size is mathematically represented as
=>
=>
Answer:
Step-by-step explanation:
The zero (root) of a function is any value of the variable that will produce an answer of zero. Graphically, the real zero of a function is where the graph of the function crosses the x-axis.
~~~~~~~~~
f(x) = x³ + 3x² - x - 3
f(-3) = ( - 3 )³ + 3( - 3 )² - ( - 3 ) - 3 = 0
f(-1) = ( - 1 )³ + 3( - 1 )² - ( - 1 ) - 3 = 0
f(1) = ( 1 )² + 3( 1 )² - ( 1 ) - 3 = 0
