A church window consisting of a rectangle topped by a semicircle is to have perimeter p. Find the radius of the semicircle if the area of the window is to be maximum. Use pi to represent .

All of the following are free tools to you prepare for the sat except

The chart below matches messenger rna codons with amino acids. a dna strand has the sequence of bases, aat. according to the chart, the corresponding messenger rna codes for which amino acid?

Which statement best describes gravity? it is the force that repels only very small objects. it is the force that acts between objects with zero mass. it is the force that sometimes acts only on very large objects. it is the force that acts between any two objects in the universe.