Three research departments have 8, 10, and 9 members, respectively. Each department is to select a delegate and an alternate to represent the department at a conference. In how many ways can this be done?

b

step-by-step explanation:

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it

a

step-by-step explanation:

answer: translate the circles so they share a common center point and dilate circle y by a scale factor of 3.