III. Very short answer type questions:                                                    9 X 1 =  9 21.  Name the chemicals that are used to remove weeds.

22. Write the name of bacteria that helps in the formation of curd.

23.  which cell does not have nucleus?

24. Name some artificial fibres

25.  Name the element present in coal

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26.  What is the unit for expressing the calorific value of a fuel?

27. What is meant by atmospheric pressure?

28.Name the device which work on the principle of multiple reflection

29. which part of the cells contains organells please I mark you brainlest ​

Drag and drop the answers into the boxes to complete this informal argument explaining how to derive the formula for the volume of a cone. since the volume of a cone is part of the volume of a cylinder with the same base and height, find the volume of a cylinder first. the base of a cylinder is a circle. the area of the base of a cylinder is , where r represents the radius. the volume of a cylinder can be described as slices of the base stacked upon each other. so, the volume of the cylinder can be found by multiplying the area of the circle by the height h of the cylinder. the volume of a cone is of the volume of a cylinder. therefore, the formula for the volume of a cone is 1/3 1/2 1/3πr^2h 1/2πr^2h πr^2h πr^2

Zahra was given two data sets, one without an outlier and one with an outlier. data without an outlier: 15, 19, 22, 26, 29 data with an outlier: 15, 19, 22, 26, 29, 81

Simplify 6sin θsec θ. choices a) 6 tan θ b) 6 cos θ c) 6 cot θ d) 6