martin has read ​90% of a book. He has more pages to finish. How many pages are there in the​ book? HELP PLEASE ASAP

Franco wants to double the volume of the cone. what should he do?

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?