Can someone me in detail if two spherical pieces of cookie dough have radii of 3cm and 5cm. the pieces are combined to form one large spherical piece of dough. what is the approx radius of the new sphere of dough?
ratio of two volume cylinders (geometry)
if two similar cylinders have heights of 75cm and 25cm. what is the ratio of the volume of the larger cylinder to the volume of the smaller cylinder? can someone explain in detail. you!

Martha has a deck of cards. she has lost some of the cards, and now the deck only contains nine spades, eleven diamonds, eight clubs, and twelve hearts. martha predicts that whenever she draws a card from the deck without looking, she will draw a club one-fifth of the time. which activity would best allow martha to test her prediction? a. randomly draw a card from the box and see if it is a club. b. randomly draw a card. then, continue to draw another card until all eight clubs are drawn. c. randomly draw and replace a card 120 times. then, observe how close to 30 times a club is drawn. d. randomly draw and replace a card 100 times. then, observe how close to 20 times a club is drawn.