To get the simple interest, we must use the formula: I= (p)(r )( t)
So, in this one we need to multiply $900x18x9.% and the answer will be $128.25. This is the amount of interest they are going to pay per year.
I believe it is 21 laps... Yes, 21 laps. Hope this helps!
There is a 40% possibility of making 0 points.
There is a (.6)(.4) = 24% possibility of making 1 point.
There is a (.6)(.6) = 36% possibility of making 2 points.
Expected value = 0 * .40 + 1 * .24 + 2 * .36 = 0.96
a) She is most likely to make 0.96 points.
b)
Expected value = 0 * ( .4) + 1 * (.6)(.3) + 2 * (.6)(.7)
she is most likely to make 1.8 points.
Hope I helped.
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