Solve the problem.The stem and leaf plot depicts the scores earned on individual driver tests in the month of July. 
Units 10|0 = 10 0 pointsDescribe the shape of the distribution.
A. Normal
B. Left skewed
C. Uniform
D. Right skewed
Answer: B
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Solve the problem.Suppose f(x) = 30.2 + 1.3 log (x + 1) models salinity of ocean water to depths of 
at a certain latitude. x is the depth in meters and f(x) is in grams of salt per kilogram of seawater. Approximate the salinity (to the nearest hundredth) when the depth is 609 meters.
A. 82.82 B. -26.58 C. 33.82 D. 85.42
Conrad and Jill have a taxable income of $63,670. They discovered that they are able to receive a $1,500 tax credit for purchasing an energy efficient furnace. How will this tax credit affect their taxes?
A. The tax credit will increase their taxable income by $1,500. B. The tax credit will reduce their taxable income by $1,500. C. The tax credit is added to the tax owed, not the taxable income. D. The tax credit is subtracted from the tax owed, not taxable income.
Find the future value P of the amount P0 invested for time period t at interest rate k, compounded continuously. P0 = $1,580,000, t = 15 yr, k = 3.1%
A. $1,942,724.78 B. $2,515,382.42 C. $199,563,907.55 D. $76,128,663.25
Seven pennies were tossed 100 times. The numbers of heads recorded were 40, 51, 42, 47, 40, 44, and 56. Find the standard deviation of the number of heads. Round your answer to two decimal places.
A) 217.43 B) 14.75 C) 23.45 D) 15.25 E) 320.00