PLEASE HELP Which graph represents the piecewise function?

y={x−4 if x≤0

−2x if x>0

5,600 x 10^3 = a) 560 b) 5,000,600 c) 5,600,000 d) 56,000

The random variable x has probability density function f (x) = k(−x²+5x−4) 1 ≤ x ≤ 4 or =0 1 show that k = 2/9 find 2 e(x), 3 the mode of x, 4 the cumulative distribution function f(x) for all x. 5 evaluate p(x ≤ 2.5). 6 deduce the value of the median and comment on the shape of the distribution.

The probability brenda will recieve a telemarketing call is 15%. if she gets 20 calls a day, how many can she expect to be telemarketing calls ?