Solve the variation problem.The amount of water used to take a shower is directly proportional to the amount of time that the shower is in use. A shower lasting 22 minutes requires 15.4 gallons of water. Find the amount of water used in a shower lasting 4 minutes.
A. 3.5 gallons
B. 2.1 gallons
C. 2.8 gallons
D. 88 gallons
Answer: C
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Add or subtract as indicated.
+ 
A. 1
B. 
C. 
D. 
Provide an appropriate response.Suppose you have to develop a model to predict snowfall for the upcoming winter based on data from previous winters. Consider the table of annual snowfall over the last five years:
Would it be possible to come up with one model that predicted very low amounts of snowfall and another that predicted very high amounts of snowfall? How so? If you were employed by a ski resort to come up with a model, what type of model would you use? What could be done to try to reduce the chance of coming up with such different models?
What will be an ideal response?
Divide.90 ÷ 3
A. 30 B. 32 C. 28 D. 33
Write the number in the sentence in words.There were 961 cars parked in the lot outside a large mall.
A. one hundred sixty-nine B. six hundred nine C. nine thousand sixty-one D. nine hundred sixty-one