In this situation, simple interest is calculated yearly. How much interest was earned?

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principal:$8000
time:4 years
interest rate:12%

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.

70 points ! pls 2. given the following two sets of data what is the union of the two sets and what is the intersection of the two sets. set a = {1, 2, 3, 4, 5, 6, 7, 8, 9} set b = {2, 4, 6, 8, 10, 12, 14} 3. given a regular deck of cards. describe a way of pulling cards that would create a dependent event and then one that would create an independent event. 4. what is the probability of drawing a red card and then drawing a spade without replacing the card that was drawn first?

Urgent? will give brainliest to the first correct answer what is the area of the figure?