4. about 30% of the u. s. population is under 20 years old. about 17% of the population is over 60, which of the following is the probability that a person chosen at random is under 20 or over 60?

-17%
-53%
-47%
-30%

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

What number line represents the solution set for the inequality -1/2 greater than or equal to 4

Select the correct answer from each drop-down menu. consider the following polynomials equations. 3x^2(x-1) and -3x^3+ 4x^2-2x+1 perform each operation and determine if the result is a polynomial. is the result of a + b a polynomial? yes or no is the result of a - b a polynomial? yes or no is the result of a · b a polynomial? yes or no