A math book is 2.9 dm wide. How many millimeters wide is the book? (1 dm = 100 mm)

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The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).

If olu is twice as old as funmi if the sum of their ages is 60 how old is olu

Find the value of x for which line a is parallel to line b