Could someone help me with these questions.
If an equation s(t)=t^3 - 2t^2 + 1 describes an object's motion in metres, at what time t, in seconds, will the object be stationary?
a) 1s
b) 0s and 4/3s
c) 0s
d) 4/3s
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A box is to be constructed from a sheet of cardboard that measure 24 cm x 24 cm. A square from each corner of the sheet will be cut and then the sides will be folded to create the box. What is the greatest volume this box can be if it is constructed in this manner?
a) 264.5 cm^3
b) 759 cm^3
c) 1024 cm^3
d) 276.125 cm^3
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A farmer wants to divide his 2700 km^2 of land into two separate pastures for his new horses by building a fence that will enclose both pastures. He wants to pasture to be twice the size as the other. What should the dimensions of the larger pasture be if he wants to use the least amount of fencing?
a) 30 km x 30 km
b) 60 km x 60 km
c) 60 km x 90 km
d) 60 km x 30 km
Thank you~
1 answer