You arrive in my class 50 seconds after leaving math which is 90 meters away. How fast did you travel?

Explanation:

The speed of an object can be found by using the formula

d is the distance

t is the time taken

We have the final answer as

Hope you this helps you

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.