Answer:
x^(n+2)
Step-by-step explanation:
When multiplying two monomials with the same base but different exponents,
under the multiplication rule of exponents,
the product becomes the base number to the power of the sum of the exponents.
For example:

Therefore, since x^n and x^2 both have x as their bases,
the product becomes x^(n + 2)
To 55% of 150 we do:
0.55*140=77
55% of 140 77
Answer:
28
Step-by-step explanation:

35×80=2800
2800÷100=28
Please write that as 4.321 × 10^(−4). The " ^ " indicates exponentiation and the parentheses help make clear that your exponent here is a negative one.
Rewrite 4.321 × 10^(−4) by moving the decimal point 4 places to the left:
0.0004321