A square with a side length of 10 cm has an area of () A. 1 square meter B. 1 square decimeter C. 1 square centimeter

A square with a side length of 10 cm has an area of () A. 1 square meter B. 1 square decimeter C. 1 square centimeter


10 × 10 = 100 (square centimeter) = 1 (square decimeter) answer: its area is 1 square decimeter



According to the report, 74% of the trees planted in 2009, 81.4% in 2010 and 89.54% in 2011 survived, so the average growth rate of tree survival in these three years is ()


Growth rate from 2009 to 2010: 81.4% divided by 74% - 1 = 0.1
Growth rate from 2010 to 2011: 89.54% divided by 81.4% - 1 = 0.1
Average growth rate of trees in three years: (0.1 + 0.1) / 2 = 0.1, i.e. 10%



When m is a value, the two roots of the quadratic equation mx2-2 (M + 1) x + M-1 = 0 are positive numbers


It is a quadratic equation m ≠ 0,
Δ = 4 (M + 1) ^ 2-4m (m-1) = 12m + 4 ≥ 0, m ≥ - 1 / 3,
2 (M + 1) / M > 0, M > 0 or M0, M > 1 or M1



How many centimeters is 25.5 inches? Be accurate!


One centimeter is equal to 0.3937 inch
So 25.5 inches equals
77012954029080518161036322073cm
I don't know whether such an answer is accurate enough or not



How many meters is 25 cm plus 85 decimeters


87.5 decimeters



How many centimeters is 25 inches


If it's a TV, 25 "refers to inches. If it's changed into centimeters, it should be about 63.5, which refers to the diagonal length of the screen. Note: 1 inch = 2.5399 cm
If it is inch, then 1 inch = 3.3333cm, and the centimeter should be about 83.33cm



How many centimeters is 25 inch * 25 inch multiplied by how many centimeters
Is it 83.25 × 83.25 cm or 63.5 cm times 63.5 cm. It's a very different length


1 inch = 25.4mm, 25 inch * 25 inch should be equal to 63.5cm times 63.5cm



How many centimeters per hour is 13 decimeters per second


13 decim / S = 130 cm / S = 130 × 60 = 7800 cm / min = 7800 × 60 = 468000 cm / h



How many meters is 24 decimeters?


2.4m



How many meters is 59 decimeters


5.9m
[analysis]:
Because 1 decimeter = 0.1 meter
So 59 decimeters = 5.9 meters
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