Perform a least squares analysis using a spreadsheet program (i. e. ms-excel), and prepare a calibration plot of absorbance vs. concentration for the six standards (#1,2,3,4,5,6). do not include the blank as an experimental point! from the least squares analysis, calculate the concentration of iron in the unknown. make sure to label chart properly with title, x-axis, and y-axis. also include the equation and the r-squared value on chart.

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.'

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take it another

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet

he has 140 chickens because he has 10 times more chickens than ducks and he has 14 ducks so 14*10=140