13. a new mystery novel will cost ally $26.60. if she earns $6.65 an hour, how many hours will
she have to work in order to purchase it?
a. 2
b. 19.95
c. 4
d. 189

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled

Ariver current has a velocity of 5km/h relative to the shore, and a boat moves in the same direction as the current at 5 km/h relative to the river. how can the velocity of the boat relative to the shore be calculated?

Can someone me out on this question for my national 5 chemistry homework