Abcd is a rectangle. if ac = 3y/5 anf bd= 3(y-4), find the length of each diagonal

a.) 4; ln = mp = 4
b.) 3; ln = mp = 7
c.) 1; ln = mp = 67
d.) 5/3; ln = mp = 29/3

Remember please that Diagonals of a Rectangle are equal to each other: 3y/5 = 3(y-4)
So 
3y = 15(y-4)
3y = 15y - 60
60 = 12y
y = 5 Diagonals are both 3 units
With that you will be able to know which is the answer from your options

He has to pay $ 2.76 for the yogurt.

Step-by-step explanation:

Given data

Cost of each ounce = $ 0.24

Vanilla yogurt = 6.5 ounces

Strawberry yogurt = 5 ounces

Total ounces = 6.5 + 5 = 11.5 ounces

Now Total cost of yogurt = 11.5 × 0.24

Now Total cost of yogurt = $ 2.76

Therefore he has to pay $ 2.76 for the  yogurt.