Answer:
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According to the data give, the mean is 120, with a standard deviation of 8. 60% or a z-score of 1 would be those with 128. Thank you for your question. Please don't hesitate to ask in Brainly your queries.
Robin has to go shopping for her brother's birthday.
She already bought "x" presents for him.
The next day, Robin bought "2" more presents for him just in time for his birthday.
When she got home and celebrated his birthday, her beother opened, in total, "9" presents.
--- What is the number of presents that Robin had originally purchased? ---
Cookie Cake is in the form of a circle.
Radius of circle = 1/2 * diameter of circle = 1/2*13=13/2=6.5 in
Thus the Area of the circle =
=
Area of a fourth of the Cookie cake