Bella brought 8/10 gallon of water on a hiking trip. she drank 6/10 gallon of water. how much water is left?

Which logarithmic equation is equivalent to the exponential equation below? e^a=55(you will receive 34 points)

Students are given 3 minutes for each multiple-choice question and 5 minutes for each free-response question on a test. there are 15 questions on the test, and students are given 51 minutes to take it.how many multiple-choice questions are on the test?

Anyone know? will mark brainliest if you're correct!