Adults and children can sign up for a virtual fun run race. It costs $30 per adult and $20 per child for the fun run race. The expression 30a + 20c can be used to calculate the cost (in dollars) for adults and c children to participate in the virtual fun run. Use the expression to determine the total cost (in dollars) for 2 adults and 4 children to participate in the fun run.

$140

am i right?

pls check if im right

i don't quite understand it

question: how many people can she serve?

answer: she can serve 16.66666667 people. so she can only give 16 people a complete serving.

question: does she have enough ice cream for her guests?

answer: no. explanation: she only has enough for 16 people to have a full serving. however, she can give a 17th person a partial serving.