Let f : R R→Z be the closed binary operation defined by f (a, b) _ _a + b_. (a) Is f commutative? (b) Is f associative? (c) Does f have an identity element?
Is 72.98 = 72.980 my answer is true.. Is it correct?
Assuming equal concentrations, rank these aqueous solutions by their freezing point: low to high NH4Cl, Sn(ClO3)4, Na2SO4, and AlBr3.
find the molar solubility of zinc carbonate if its ksp=1.5x10^-10. (at 298K)
If the length of a rectangle is 4 more than 3 times the width, and the perimeter is 32 meters, what are its dimensions? Please enter your answer as two numbers without the units, separated by a comma.
a quiz consists of 30 true or false questions. if the student guesses on each question, what is the standard deviation of the number of correct answers
A ceiling fan starting from rest reaches an angular velocity of 30 rev/sec in 5 sec. What is the angular displacement of the fan during these 5 sec? Can you show me the steps need to figure this question out? Thanks!
A drawbridge with a weight of 5000 N is supported by a hinge and rope and is in static equilibrium. The length of the drawbridge is 5 m and the rope is attached to the draw bridge a distance of 4 m from the hinge. What is the tension force rope provides? Can you show me steps ...
I'm sorry, but I don't think this is possible since 999 + 999 = 1098 (even the sum of the largest possible three-digit numbers do not give us a large enough total. 104 x 162 = 16848 (not sure if you wanted a "product?" I found this by trial and error with a c...
there are 9 candidates running for 3 seats....how many different election results are possible