40cm has been rounded to 1 significant figure. What is the smallest length it could be?

Show that the sum, over the set of people at a party, of the number of people a person has shaken hands with, is even. assume that no one shake his or her own hand.

When standing upright, gary knows his eyes are 6 feet above ground level. to determine the depth of a well, he stands in the position shown. a 6 foot tall man stands 2 feet away from a 6 foot wide well of unknown depth.

Estimate how many 12 - inch rulers will be about the same length as a sheet of paper

Bob has 18 coins, both dimes and nickels, worth $1.45. How many of each coin does he have?

40 In is what percent of 75 Ib

There are five marbles in a bag do you bring into a yellow you draw marble replacing it and then Jonathan what is the probability of choosing to yellow

At a factory, 450 bottles of ketchup are produced each hour. Write an equation that can be used to show the relationship between time in hours (h) and the number of bottles (B) of ketchup produced.

find the length of a rectangular lot with a perimeter of 140 m if the length is 6 m more than the width.

To make 2 batches of nut nars, jayda needs to use 4 eggs how many eggs used in each batch of nut bars

Over the summer, for every 14 okra seeds Dana planted, 9 grew into plants. If he planted 210 okra seeds, how many grew into plants?