At a fish farm, at the beginning of the season, the farmer releases a number of fry, which have a mark of 1000. In the fish harvest season, when 120 fish were randomly tested, they had an average weight of 1.6 kg, standard deviation was 0.21 kg, of which 15 were marked. With 95% confidence. a. Estimate the average weight of the total fish in the farm.
b. Estimate the range for the percentage of marked fish in the farm.
c. From sentence b, infer the number of fish in the range?
d. Assume the selling price of fish is VND 27,000/kg, and from the above sentences, calculate the farm's revenue from selling all the fish.
Please help me solve this !!!

What is the slope of a line that is perpendicular to y = 3x + 1

Cone w has a radius of 8 cm and a height of 5 cm. square pyramid x has the same base area and height as cone w. paul and manuel disagree on how the volumes of cone w and square pyramid x are related. examine their arguments. which statement explains whose argument is correct and why? paul manuel the volume of square pyramid x is equal to the volume of cone w. this can be proven by finding the base area and volume of cone w, along with the volume of square pyramid x. the base area of cone w is π(r2) = π(82) = 200.96 cm2. the volume of cone w is one third(area of base)(h) = one third third(200.96)(5) = 334.93 cm3. the volume of square pyramid x is one third(area of base)(h) = one third(200.96)(5) = 334.93 cm3. the volume of square pyramid x is three times the volume of cone w. this can be proven by finding the base area and volume of cone w, along with the volume of square pyramid x. the base area of cone w is π(r2) = π(82) = 200.96 cm2. the volume of cone w is one third(area of base)(h) = one third(200.96)(5) = 334.93 cm3. the volume of square pyramid x is (area of base)(h) = (200.96)(5) = 1,004.8 cm3. paul's argument is correct; manuel used the incorrect formula to find the volume of square pyramid x. paul's argument is correct; manuel used the incorrect base area to find the volume of square pyramid x. manuel's argument is correct; paul used the incorrect formula to find the volume of square pyramid x. manuel's argument is correct; paul used the incorrect base area to find the volume of square pyramid x.

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?