Answer:
291.87 is a rational number.
Step-by-step explanation:
Rational numbers are those numbers that can be expressed in fractions that is can be written as 
where p and q are integers and 
.
Consider the given number 291.87
Rewrite the decimal number as a fraction with 1 in the denominator, we get,
Multiply to remove 2 decimal places. Here, you multiply top and bottom by 10² = 100
Thus, the above fraction can be written as,
Thus, 291.87 is a rational number.
Answer: N2 + 3H2 → 2NH3
Step-by-step explanation:
Answer:
C(n, 2)a^(n-2)b^2
Step-by-step explanation:
Generally, the expansion is written in decreasing powers of "a", so the first few terms would have variable constellations that look like ...
a^n, a^(n-1)b, a^(n-2)b^2, ...
The coefficients would be (in order), C(n, k) for k increasing from 0, so the coefficient of the 3rd term would be C(n, 2).
Step-by-step explanation:
Empty boxes need to be filled with coefficients of 
First box: 3
Second box: 3
Third box: 1
