Aparticle moves along the x-axis so that at any time t, its position is given by x(t) = 1/2 sint+cos (2t). what is the acceleration of the particle at t=pi/2

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.

Aflower has 26 chromosomes. to create a new flower,how many would a sperm cell have what is called?

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.