At Bear Valley Middle School, 90% of the sixth graders went on a field trip to the science museum. There are 50 students in the sixth grade. How many sixth graders went on the field trip?

45 sixth graders went on the field trip

Step-by-step explanation:

.9 × 50 = 45

Hope this helps!!

$25

step-by-step explanation:

25 - 4.50 = 20.5

20.5 / 2 = 10.25

10.25 + 10 = 20.25

20.25 - 12.50 = 7.75

therefore the answer is $25 as shown as the first number.