Solve the problem.The table below summarizes the construction cost of a set of homes (excluding the lot cost) along with the square footage of the home's floor space. Find a linear equation that relates the construction cost in thousands of dollars to the floor space in hundreds of square feet by finding the least squares line for the data.
A. y = 7.97x - 13.54
B. y = 7.87x - 13.08
C. y = 8.13x - 12.79
D. y = 8.13x
Answer: A
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Use the indicated formula to find the sum.Use S = 
to find the sum of 20 + 21 + 22 + . . . + 625.
A. 195,454 B. 195,435 C. 194,829 D. 194,810
Solve.Two forces of 37 and 45 N (newtons) act on an object at right angles. Find the magnitude of the resultant and the angle that it makes with the smaller force.
A. 58 N, 56° B. 58 N, 51° C. 58 N, 39° D. 3394 N, 51°
Solve the problem. Express the answer in scientific notation to two decimals.A computer can do one calculation in 1.4 × 10-7 seconds. How long would it take the computer to do a trillion (1012) calculations?
A. 1.4 × 10-7 sec B. 1.4 × 106 sec C. 1.4 × 1012 sec D. 1.4 × 105 sec
Solve the problem.John owns a hot dog stand. His profit, in dollars, is given by the function 
where x is the number of hot dogs sold. What is the most he can earn?
A. $108 B. $49 C. $150 D. $87