Suppose a 5×7 matrix a has four pivot columns. What is dim nul a? is col a=ℝ4? why or why not?.

4/6 = 2/3

so it should take 3/3 hours per man. so 9 hours is the answer 3*3 =9

step-by-step explanation:

maximum area = xy = (16)(32) = 512 ft2

to maximize the area of the garden, the side of the fence parallel to the side of the house should be 32 ft long, and the other two sides should both have length 16 ft.'

source

answer: no

step-by-step explanation:

you are only given the cost not the amount of pounds.