I don't understand this

I think it would be D...

Step-by-step explanation:

I think it would be D because whenever I put it in my calculator, and I do second trace and input -1 for my x value, it comes up 7.1666667. Also, I'm pretty sure for something to be perpendicular, there cannot be a curve and they have to intersect.

blue marble is 15 times out of 50 = 15/50 reduces to 3/10

landing on tails is 24 out of 50 = 24/50 reduces to 12/25

to find the probability of both multiply together:

3/10 x 12/25 = 3 x 12 / 10 x 25 = 36/250

if you multiplied the numerator and denominator by 10 you get 360/2500.

the answer is 360/2500