Which of the following statements concerning the standard normal curve is/are true (if any)?

a) the area under the standard normal curve to the left of -3 is zero.

b) the area under the standard normal curve between any two z-scores is greater than zero.

c) the area under the standard normal curve between two z-scores will be negative if both z-scores are negative

d) the area under the standard normal curve to the left of any z-score is less than 1.

a. a, b
b. b, d
c. a, c
d. a

Line u passes through points (-52, -18) and (-29, 53). line v passes through points (90, 33) and (19, 56). are line u and line v parallel or perpendicular?

Chosen according to the volume of oil it can haul, as shown in at a railway yard, locomotives are used to haul containers carrying the table. locomotive capacity a450 0 -750 cubic feet cg35 750-1,500 cubic feet br73 1,500-2,500 cubic feet yh61 2,500-3,500 cubic feet & the four cylindrical containers listed in the table need to be hauled. cylinder length (ft.) diameter (ft.) fill level a 40 , 12 half b 24 8 full c 16 16 full 6 12 full d match each container to the locomotive needed to haulit a450 cylinder a yh61 cylinder d

The salesperson earns a 5% commission on the first $5,000 she has in sales. the salesperson earns a 7.5% commission on the amount of her sales that are greater than $5,000. this month the sales person had $8,000 in sales. what amount of commission, in dollars, did she earn?