Arnold buys 3
3
5
pounds of green grapes for $1.85 per pound. He buys 3
3
5
pounds of red grapes for $2.30 per pound. Which expression can be used to determine the total cost, in dollars, of the grapes Arnold buys?

A) 3.6(1.85 + 2.30)
B) 3.6 • 1.85 • 2.30
C) (3.6 + 3.6)(1.85 + 2.30)
D) (3.6 • 3.6) + (1.85 • 2.30)

A) 3.6(1.85 + 2.30)

Step-by-step explanation:

Given that pounds of grapes at $1.85/pound and of red grapes at $2.30 per pound.

Given the mass of the different grapes is the same, the cost can be expressed as;

Hence, the cost can be expressed as 3.6(1.85+2.30)

16 meters

Step-by-step explanation:

is tangent to the circle at point R and FR is radius.

(Tangent radius theorem)

So, is right angled triangle and FS is its hypotenuse.

Let FR = FT = r

FS = FT + ST = r + 9

Now, by Pythagoras theorem:

Thus, the diameter of the fountain is 16 meters.