Bosco

   What is 3.896745221349(45.89932261)     

   The numbers are too long for an ordinary calculator.     

   Approximate as 3.8967 x 45.8993 = 178.85580231     

                                               round to 178.86     

   _.     

If an ant crawls from one corner to the other corner of a 3 \times 5 rectangle, then it will cross through seven squares.     

If the ant crawls from one corner to the other corner of a 15 \times 16 rectangle, then how many squares will it cross through?     

I used desmos.com to graph y = (15/16) x  and counted them:  The ant passes through 30 squares     

Note that in a 3x5 grid it was 7 and that in a 15x16 grid it was 30.     

Both times it equaled L + W – 1.  Could this be a rule for all grids?     

_.     

   if i charge 75 dollars and have an intrest rate of 12.5 how much will i have to pay after one month?     

   Principal  +  Interest     

   $75          +  ($75 x 0.125 x 1/12)  =     

   $75          +  $0.78                         =  $75.78     

_.     

   what is (3y + 5)-2 rewriten with a positive exponent     

   Assuming you mean (3y + 5) ^–2     

                                 1     

   (3y + 5) ^–2   =   ––––––––     

                            (3x + 5) ²     

   _.     

   In triangle ABC, the angles \angle A, \angle B, \angle C form an arithmetic sequence.     

   If \angle A + \angle B = 21^\circ, then what is \angle C, in degrees?     

   A + B + C  =  180^o     

   A + B         =    21^o     

                C  =  159^o     probably a typo in the problem     

   _.     

   help with (b) I had ended up with 7234.56 . . . but it came out incorrect...     

   V  =  (4 / 3) π r³     

       =  (4 / 3) • 3.1416 • (6 ft)³     

       =  (4 / 3) • 3.1416 • 216 ft³     

       =  904.7808 ft³     

   You got 7234 because you cubed the diameter instead of the radius.     

   _.