Pls help me now!! (T^T) 1.
a. common monomial factoring
b. difference of two squares
c. sum and difference of two cubes
d. perfect square trinomial
e. general trinomial

2. 7b - 14a + 21d
a. common monomial factoring
b. difference of two squares
c. sum and difference of two cubes
d. perfect square trinomial
e. general trinomial

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

The circumference of a redwood tree trunk is 20π ft, and it is 100 ft tall. what is the approximate volume of the redwood tree trunk? 1,000π ft3 10,000π ft3 4,000π ft3 40,000π ft3