Max makes a scale drawing of distance between salt lake city and arizona. the distance between salt lake city and arizona is 24.8 cm. if each 7 cm on the scale drawing equals 250 miles, how far are the salt lake city and arizona?

a) 24.8/7 =250/x; x = 70.56 mi

b) 7/250 = x/24.8; x = 0.69 mi

c) 250/25 = x/7; x = 70 mi

d) 7/250 = 24.8/x; 885.71

Exercise: counting committees 0.0/2.0 puntos (calificable) we start with a pool of n people. a chaired committee consists of k≥1 members, out of whom one member is designated as the chairperson. the expression k(nk) can be interpreted as the number of possible chaired committees with k members. this is because we have (nk) choices for the k members, and once the members are chosen, there are then k choices for the chairperson. thus, c=∑k=1nk(nk) is the total number of possible chaired committees of any size. find the value of c (as a function of n ) by thinking about a different way of forming a chaired committee: first choose the chairperson, then choose the other members of the committee. the answer is of the form c=(α+nβ)2γn+δ. what are the values of α , β , γ , and δ ?