Rodrigo tested 7 light bulbs in each string of lights before hanging them outside. Each string of lights has an equal number of light bulbs. Is this
sample of light bulbs from the strings of lights likely to be biased?

Agreeting card company can produce a box of cards for $7.50. if the initial investment by the company was $50,000, how many boxes of cards must be produced before the average cost per box falls to $10.50?

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.