21 is a rational number because it is an integer, which can be converted into a fraction.
<u>Step-by-step explanation:</u>
When a denominater and numerator are integers and gives a quotient then it is a rational number.
21/1, where 21 is denominator and 1 is numerator the quotient is 21. Therefore 21 is a rational number which can also be considered as a ratio.
Answer:
Your final answer will be, x^2 +4x -12
Step-by-step explanation:
Answer: Probability that the proportion of students who graduated is greater than 0.743 is P = 0.4755
Step-by-step explanation:
Given that,
Probability of freshmen entering public high schools in 2006 graduated with their class in 2010, p = 0.74
Random sample of freshman, n = 81
Utilizing central limit theorem,
So,
= P( Z > 0.0616)
= 0.4755 ⇒ probability that the proportion of students who graduated is greater than 0.743.
Answer: $1562
Step-by-step explanation:
Since the attorney charges a flat fee of $50 and 21% of what he can collect for Lee from customers whose accounts are past due, then if be collected $7200 from last due, the total fee that the attorney will earn will be:
= $50 + (21% × $7200)
= $50 + (0.21 × $7200)
= $50 + $1512
= $1562
Therefore, the amount that the attorney will earn is $1562