Help appreciated!!! (will mark as brainliest if correct)

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500

Aaron paid $9.75 for markers that cost $0.75 each. he bought 4 times as many pencils for $0.35 each. how much did aaron pay for pencils?

Mika can eat 2121 hot dogs in 66 minutes. she wants to know how many minutes (m)(m) it would take her to eat 3535 hot dogs if she can keep up the same pace. how many minutes would mika need to eat 3535 hot dogs?