Determine whether quantities vary directly or inversely and find the constant of variation. a teacher grades 25 students essays in 4 hours. assuming he grades at the same speed, how long will it take him to grade 35 essays?

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x

2. using calculations based on a perpetual inventory system, determine the inventory balance altira would report in its august 31, 2021, balance sheet and the cost of goods sold it would report in its august 2021 income statement using the average cost method. (round "average cost per unit" to 2 decimal places.)

Becca wants to mix fruit juice and soda to make a punch. she can buy fruit juice for $3 a gallon and soda for $4 a gallon. if she wants to make 28 gallons of punch at a cost of $3.25 a gallon, how many gallons of fruit juice and how many gallons of soda should she buy?