Ascience museum offers tours for school groups with 20 or more students. the tour costs $100 plus $3.50 for every student in excess of 20 students. a school group pays $345 for the tour. part a: write an equation that can be used to determine the number of students, n, who went in the tour. explain how toy determined your answer

Equation : 100 + (n - 20) × 3.5 = 345

90 students went for tour.

Step-by-step explanation:

Since, the cost of first 20 students is fix and it is $100

and, each student after these 20 students has to pay $3.50, also tour cost is $345.

Let the number of total student went for tour be "n".

Hence, we get equation,

100 + (n - 20) × 3.5 = 345

⇒  (n - 20) × 3.5 = 345 - 100

⇒  (n - 20) × 3.5 = 245

⇒  (n - 20) = 245 ÷ 3.5

⇒  (n - 20) = 70

⇒ n = 90 students

answer: 60%

explanation:

÷

= 60%