Write the name of each artifact and the elevation at was found using a positive integer, zero or negative integer

arrowhead : 15

bone : 721

clay bowl : 0

necklace : 462

woven basket : -1200

Step-by-step explanation:

Consider sea level to be zero elevation, then anything above sea level is related to a positive number equal he elevation at which it was found, and anything below sea level would be associated with a negative number (the opposite of the depth at which it was found,as shown below:

arrowhead : 15

bone : 721

clay bowl : 0

necklace : 462

woven basket : -1200

she played for 18.75 hours.

step-by-step explanation:

if she played 2/4 of a hour on tuesday. and there is 60 minutes in an hour and 60 divided by 4 is 7.5. and she played 2/4 of an hour on thursday then again 60 divided by 4 is 7.5, you add 7.5+7.5=56.25. now you have to do 1/4 of an hour, it equals 3.75. now you have to add them all up. 3.75+7.5+7.5=18.75

i hope this and i hope you get it right. it took me a while to get this done for you. : )

8y^50

step-by-step explanation: