6. A conveyor belt sushi restaurant lets you choose what to eat from different-coloured plates that go by. You pay based on the colours of the plates. After lunch, Ming has 2 red plates, 4 yellow plates, and 1 blue plate. How many ways can she stack her plates in a single tower? Show your work.

Kindly help.thanks

Lawn fertilizer is sold in bags and one bag of fertilizer can cover 1,000 square feet. Each bag costs $3.64 (including tax). If Julia's lawn is approximately 18,000 square feet, how much money will she spend on fertilizer for her lawn?    A. $6,552.00 B. $69.16 C. $65.52 D. $18.00

Blake and April are both taking AP Calculus, but they have different teachers who have two different grading systems. Blake is in Mr. Frey’s class and April is in Coach Smith’s class. Blake is mad because she thinks that with her averages, she would have a higher average in Coach Smith’s class. Given her averages below, what would be her overall average for each class? Round to the nearest whole number. Mr. Frey’s Class (Blake) Coach Smith’s Class (April) Test 35% Quiz 20%Homework 10% Classwork 15%Final Exam 20% Test 45%Quiz 20%Homework 10% Classwork 10%Final Exam 15%   Test Quiz HW CW Final Exam 84 75 90 85 90 Blake’s grade with Mr. Frey Blake’s grade with Coach Smith