43. challenge a motorized scooter has tires with a radius of 3 1/2 inches.
the tires make one revolution every 1/10 second. find the speed of the
scooter in miles per hour. round to the nearest tenth. (hint: the speed of
an object spinning in a circle is equal to the circumference divided by the
time it takes to complete one revolution)

The ratio of rock songs to dance songs on jonathan’s mp3 player is 5: 6. the total number of rock and dance songs jonathan has is between 101 120. how many rock songs does he have?

Solve x+3y=6 and 4x-6y=6 by elimination . show work !

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?