If Harriet rolls the number cube 39 times, how many times can she expect to roll a 3 or 4?

Nikolas calculated the volume of the prism. his work is shown below.

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.

In a timed typing test lara typed 63 words per minute. estimate the number of words she should be able to type in half in hour show your work