40 seconds to 3 minutes | 3 dollars to 65 cents
ratios simplified

Step-by-step explanation:

We know:

1min = 60s → 3min = (3)(60s) = 180s

40s : 3min = 40s : 180s = (40/20) : (180/20) = 2 : 9

$1 = ¢100 → $3 = (3)(¢100) = ¢300

$3 : ¢65 = ¢300 : ¢65 = (300/5) : (65/5) = 60 : 13

55/i dont know i do it for the points

step-by-step explanation:

answer: the answer is (b) amie should have multiplied

step-by-step explanation: given a sphere and a cylinder with same radius and height.

let, 'r' be the radius of the cylinder and sphere and 'h' be the height of the cylinder. according to the question,

r = h.

now, the volume of the sphere will be

and the volume of the cylinder will be

therefore, we have

thus, ammie should have multiplied the volume of the sphere