A circle with the radius of 1 cm sits inside a 11cm by 12cm rectangle. What is the area of the shaded region?

Will give brainliest sum of arithmetic series (sigma notation) find the numerical answer to the summation given below. (image shown below)

Answer this question, only if you know the answer. 30 points and brainliest!

Tod does not have any cookies. david gives jeff 8 cookies. then he splits half of the cookies he has left with tod. david let’s c represent the number of cookies that he starts with. he finds the number of cookies that tod has is 1/2 the difference of c and 8. write an expression to represent the number of cookies that tod has.