The revenue, in dollars, from the sale of x belts is given by R(x)=40x^4/7 Find the rate at which average revenue is changing when 545 belts have been produced
When 545 belts have been produced and sold, the average revenue is changing at :1) dollars per belt 2) belts per dollar for each additional belt
(Round to four decimal places as needed. Do not include the $ symbol in your answer.)

Samson is going shopping for sugar and butter to make three different kinds of cookies: lemon bars, peanut butter cookies, and sugar cookies. the recipe for lemon bars calls for 2 cups of flour, 2 cups of sugar, and 1 stick of butter. the peanut butter cookie recipe calls for 2 cups of flour, 4 cup of sugar and 2 stick of butter. the sugar cookie recipe calls for 1 cup of flour, 2 cups of sugar, and 2 sticks of butter. sampson has 13 cups of flour at home, and he buys 12 cups (6 pounds) of sugar and 10 sticks of butter. how many batches of each type of cookie can he make? samson can make batches of lemon bars, batches of peanut butter cookies, and batches of 09 cookies submit reset

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122