How many 6 digit combinations are there using only numbers 1-9?

In which figure is de bc ? a. figure 1 b. figure 2 c. figure 3 d. figure 4

Let the closed interval [a , b] be the domain of function f. the domain of f(x - 3) is given by (a) the open interval (a , b) (b) the closed interval [a , b] (c) the closed interval [a - 3 , b - 3] (d) the closed interval [a + 3 , b + 3]

What is the lcm of 16 and 40 ? 24 and 40 ?