Mary has to choose between a job and learning french during summer
break. what will be the opportunity cost if she wants to study french?
o
having the opportunity to study french
losing the opportunity of a summer job
paying for the french lessons

To develop a molecular clock, you need to find which of the following?

a sequence of molecules

the rate at which changes occur in a type of molecule

how much total change has occurred in a type of molecule from two different species

how many molecules a species has

Step-by-step explanation:

To develop a molecular clock, you need to find which of the following?

a sequence of molecules

the rate at which changes occur in a type of molecule

how much total change has occurred in a type of molecule from two different species

how many molecules a species has

losing the opportunity of a summer job

Step-by-step explanation:

Opportunity cost is the foregone alternative. So she has to forgo the opportunity of a summer job, to have the opportunity to study French. This means that the opportunity of a summer job is the foregone alternative which is the opportunity cost.

180

step-by-step explanation:

12-2=10

20-2=18

18x10=180

the least common denominatore of 7 and 2 is 9

step-by-step explanation:

7+2=9