Solve the problem.Nikki is fishing from a bank 31 feet above water level. In this location, the fish tend to feed at 40 feet below the surface. How long must Nikki's fish line be to reach the fish?
A. 71 feet
B. -9 feet
C. 9 feet
D. -31 feet
Answer: A
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Write the contrapositive of the statement. Then use the contrapositive to determine whether to conditional statement is true or false.If a is not an even counting number, then the product of a and the counting number b is not an even counting number.
A. If the product of a and the counting number b is an even counting number, then a is an even counting number. false B. If the product of a and the counting number b is an even counting number, then a is an even counting number. true C. If the product of a and the counting number b is an even counting number, then a is not an even counting number. true D. If the product of a and the counting number b is an even counting number, then a is not an even counting number. false
A variable force of magnitude F(x) moves a body of mass m along the x-axis from x1 to x2. The net work done by the force in moving the body from x1 to x2 is 
where v1 and v2 are the body's velocities at x1 and x2. Knowing that the work done by the force equals the change in the body's kinetic energy, solve the problem.How many foot-pounds of work does it take to throw a baseball 10 mph? A baseball weighs 5 oz, or 0.3125 lb.
A. 0.5 ft-lb B. 35.2 ft-lb C. 1.1 ft-lb D. 15.6 ft-lb
For the given simplex tableau, determine which variable should be brought into the solution and which row to use as a pivot. x1 x2 x3 x4 M
A. x2, row 1 B. x2, row 2 C. x1, row 2 D. x1, row 1
Solve the problem.The marriage rate in a certain country in 1990 was 0.9%, and there were about 435,000 marriages that year. Use the model M(t) = M0(1 + r)t, with a constant marriage rate and t = 0 corresponding to 1990 to estimate the year in which the number of marriages will be 1 million.
A. 2000 B. 2340 C. 2093 D. 2083