The course length of the Boston Marathon is about 4.2 x 10 meters. The course length of the Iditarod Trail Invitational ultra-marathon is about 1.6 x 10 meters. About how many times as long is the course of the Iditarod Trail ultra-marathon as that of the Boston Marathon?
Drag a number into the box to answer the question
The Iditarod course is about
times as long as the course of the Boston Marathon
:: 0.25
:: 0.4
:: 2.5
:: 25
:: 40
:: 250
:: 400

Afruit stand has to decide what to charge for their produce. they need $10 for 4 apples and 4 oranges. they also need $15 for 6 apples and 6 oranges. we put this information into a system of linear equations. can we find a unique price for an apple and an orange?

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?

Give all possible names for the line shown. calculation tip: lines can be written with either point first.